Disabling reporting in Kibana.yml breaks Kibana

[bhavyarm]

Kibana version: 7.8.1 BC1

Elasticsearch version: 7.8.1 BC1

Server OS version: darwin_x86_64

Browser version: chrome latest

Browser OS version: OS X

Original install method (e.g. download page, yum, from source, etc.): from staging

Describe the bug: Setting xpack.reporting.enabled: false in kibana.yml - doesn't let Kibana come up.

Steps to reproduce:

1. Add xpack.reporting.enabled: false in Kibana.yml
2. Restart Kibana
3. It fails with

  log   [21:52:28.917] [info][plugins][taskManager] Stopping plugin

 FATAL  TypeError: Cannot read property '__legacy' of undefined

Please note Setting **xpack.reporting.enabled: true ** doesn't cause any issues. Please note this is on trial license with security enabled.

[elasticmachine]

Pinging @elastic/kibana-reporting-services (Team:Reporting Services)

[bhavyarm]

Found while testing #69645

[LeeDr]

FYI, I reproduced this in 7.8.1 as well with security enabled. And did NOT reproduce it in 7.9.0-snapshot.

Some of the logging about reporting I see on 7.8.1;

{"type":"log","@timestamp":"2020-07-08T22:57:09Z","tags":["debug","config"],"pid":12572,"message":"Marking config path as handled: xpack,reporting"}

{"type":"log","@timestamp":"2020-07-08T22:57:28Z","tags":["debug","config"],"pid":12572,"message":"Marking config path as handled: xpack,reporting"}

{"type":"log","@timestamp":"2020-07-08T22:57:28Z","tags":["debug","config"],"pid":12572,"message":"Marking config path as handled: xpack,reporting"}

{"type":"log","@timestamp":"2020-07-08T22:57:28Z","tags":["info","plugins-service"],"pid":12572,"message":"Plugin \"reporting\" is disabled."}

{"type":"log","@timestamp":"2020-07-08T22:57:34Z","tags":["debug","config"],"pid":12572,"message":"Marking config path as handled: xpack.reporting"}

( *** notice this next large line ends with "message":"Initializing plugin reporting@7.8.1", why are we initializing it if it's disabled?)

{"type":"log","@timestamp":"2020-07-08T22:57:40Z","tags":["plugins","debug"],"pid":12572,"plugin":{"name":"x-pack","version":"7.8.1","author":"Elastic","private":true,"license":"Elastic-License","kibana":{"build":{"intermediateBuildDirectory":"build/plugin/kibana/x-pack","oss":false},"clean":{"extraPatterns":["plugins/*/target"]},"version":"7.8.1"},"resolutions":{"**/@types/node":">=10.17.17 <10.20.0"},"dependencies":{"@babel/core":"^7.9.0","@babel/register":"^7.9.0","@babel/runtime":"^7.9.2","@elastic/apm-rum-react":"^1.1.1","@elastic/datemath":"5.0.2","@elastic/ems-client":"7.8.0","@elastic/eui":"22.3.1","@elastic/filesaver":"1.1.2","@elastic/maki":"6.3.0","@elastic/node-crypto":"1.1.1","@elastic/numeral":"^2.5.0","@kbn/babel-preset":"1.0.0","@kbn/config-schema":"1.0.0","@kbn/i18n":"1.0.0","@kbn/interpreter":"1.0.0","@kbn/storybook":"1.0.0","@kbn/ui-framework":"1.0.0","@mapbox/geojson-rewind":"^0.4.1","@mapbox/mapbox-gl-draw":"^1.1.2","@mapbox/mapbox-gl-rtl-text":"^0.2.3","@scant/router":"^0.1.0","@slack/webhook":"^5.0.0","@turf/boolean-contains":"6.0.1","@turf/circle":"6.0.1","angular":"^1.7.9","angular-resource":"1.7.9","angular-sanitize":"1.7.9","angular-ui-ace":"0.2.3","apollo-cache-inmemory":"1.6.2","apollo-client":"^2.3.8","apollo-link":"^1.2.3","apollo-link-error":"^1.1.7","apollo-link-http":"^1.5.16","apollo-link-schema":"^1.1.0","apollo-link-state":"^0.4.1","apollo-server-errors":"^2.0.2","apollo-server-hapi":"^1.3.6","archiver":"3.1.1","axios":"^0.19.0","bluebird":"3.5.5","boom":"^7.2.0","brace":"0.11.1","broadcast-channel":"^3.0.3","chroma-js":"^1.4.1","classnames":"2.2.6","concat-stream":"1.6.2","constate":"^1.3.2","content-disposition":"0.5.3","copy-to-clipboard":"^3.0.8","cronstrue":"^1.51.0","cytoscape":"^3.10.0","d3":"3.5.17","d3-scale":"1.0.7","dedent":"^0.7.0","del":"^5.1.0","dragselect":"1.13.1","elasticsearch":"^16.7.0","extract-zip":"^1.7.0","file-saver":"^1.3.8","file-type":"^10.9.0","font-awesome":"4.7.0","formsy-react":"^1.1.5","fp-ts":"^2.3.1","get-port":"4.2.0","getos":"^3.1.0","git-url-parse":"11.1.2","github-markdown-css":"^2.10.0","glob":"^7.1.2","graphql":"^0.13.2","graphql-fields":"^1.0.2","graphql-tag":"^2.9.2","graphql-tools":"^3.0.2","h2o2":"^8.1.2","handlebars":"4.7.6","history":"4.9.0","history-extra":"^5.0.1","i18n-iso-countries":"^4.3.1","icalendar":"0.7.1","idx":"^2.5.6","immer":"^1.5.0","inline-style":"^2.0.0","intl":"^1.2.5","io-ts":"^2.0.5","isbinaryfile":"4.0.2","joi":"^13.5.2","jquery":"^3.5.0","js-search":"^1.4.3","js-yaml":"3.13.1","json-stable-stringify":"^1.0.1","jsonwebtoken":"^8.5.1","jsts":"^1.6.2","lodash":"npm:@elastic/lodash@3.10.1-kibana4","lodash.keyby":"^4.6.0","lodash.mean":"^4.1.0","lodash.topath":"^4.5.2","lodash.uniqby":"^4.7.0","lz-string":"^1.4.4","mapbox-gl":"^1.10.0","mapbox-gl-draw-rectangle-mode":"^1.0.4","markdown-it":"^10.0.0","memoize-one":"^5.0.0","mime":"^2.4.4","moment":"^2.24.0","moment-duration-format":"^2.3.2","moment-timezone":"^0.5.27","ngreact":"^0.5.1","nock":"12.0.3","node-fetch":"^2.6.0","nodemailer":"^4.7.0","object-hash":"^1.3.1","object-path-immutable":"^3.1.1","oboe":"^2.1.4","oppsy":"^2.0.0","p-retry":"^4.2.0","papaparse":"^5.2.0","pdfmake":"^0.1.63","pluralize":"3.1.0","pngjs":"3.4.0","polished":"^1.9.2","postcss-prefix-selector":"^1.7.2","prop-types":"^15.6.0","proper-lockfile":"^3.2.0","puid":"1.0.7","puppeteer-core":"^1.19.0","query-string":"5.1.1","raw-loader":"3.1.0","re-resizable":"^6.1.1","react":"^16.12.0","react-apollo":"^2.1.4","react-beautiful-dnd":"^12.2.0","react-datetime":"^2.14.0","react-dom":"^16.12.0","react-dropzone":"^4.2.9","react-fast-compare":"^2.0.4","react-markdown":"^3.4.1","react-moment-proptypes":"^1.7.0","react-portal":"^3.2.0","react-redux":"^7.1.3","react-reverse-portal":"^1.0.4","react-router":"^5.1.2","react-router-dom":"^5.1.2","react-shortcuts":"^2.0.0","react-sticky":"^6.0.3","react-syntax-highlighter":"^5.7.0","react-tiny-virtual-list":"^2.2.0","react-use":"^13.27.0","react-vis":"^1.8.1","react-visibility-sensor":"^5.1.1","recompose":"^0.26.0","reduce-reducers":"^1.0.4","redux":"^4.0.5","redux-actions":"^2.6.5","redux-observable":"^1.2.0","redux-saga":"^1.1.3","redux-thunk":"^2.3.0","redux-thunks":"^1.0.0","request":"^2.88.0","reselect":"^4.0.0","resize-observer-polyfill":"^1.5.0","rison-node":"0.3.1","rxjs":"^6.5.3","semver":"5.7.0","set-value":"^3.0.2","squel":"^5.13.0","stats-lite":"^2.2.0","style-it":"^2.1.3","styled-components":"^5.0.0","suricata-sid-db":"^1.0.2","tinycolor2":"1.4.1","tinymath":"1.2.1","topojson-client":"3.0.0","tslib":"^1.9.3","turf":"3.0.14","typescript-fsa":"^3.0.0","typescript-fsa-reducers":"^1.2.1","ui-select":"0.19.8","unstated":"^2.1.1","use-resize-observer":"^6.0.0","uuid":"3.3.2","venn.js":"0.2.20","vscode-languageserver":"^5.2.1","webpack":"^4.41.5","wellknown":"^0.5.0","xml2js":"^0.4.22","xregexp":"4.2.4"},"engines":{"yarn":"^1.21.1"},"workspaces":{"nohoist":["mochawesome","mochawesome-merge","cypress-multi-reporters"]},"build":{"git":{"count":"32085","sha":"766845d","date":"Sat, 4 Jul 2020 01:26:51 +0200"},"date":"Mon Jul 06 2020 11:19:36 GMT+0000 (Coordinated Universal Time)"}},"message":"Initializing plugin reporting@7.8.1"}

{"type":"log","@timestamp":"2020-07-08T22:57:40Z","tags":["fatal","root"],"pid":12572,"message":"TypeError: Cannot read property '__legacy' of undefined\n    at legacyInit (/usr/share/kibana/x-pack/legacy/plugins/reporting/server/legacy.js:37:50)\n    at Plugin.init [as externalInit] (/usr/share/kibana/x-pack/legacy/plugins/reporting/index.js:51:14)\n    at Object.register (/usr/share/kibana/src/legacy/server/plugins/lib/plugin.js:96:20)\n    at internals.Server.register (/usr/share/kibana/node_modules/hapi/lib/server.js:431:35)\n    at Plugin.init (/usr/share/kibana/src/legacy/server/plugins/lib/plugin.js:100:28)\n    at Plugin.init (/usr/share/kibana/node_modules/lodash/index.js:7411:25)\n    at callPluginHook (/usr/share/kibana/src/legacy/server/plugins/lib/call_plugin_hook.js:53:25)"}

[tsullivan]

Fixed in #71181