WIP: Refactor jira-config-gen Command

[calebevans]

Starting some work on refactoring firewatch to have a better structure, closer to other tools our team supports (openshift-cli-installer, qe-metrics, etc.). This PR refactors only the jira-config-gen command, other PRs will follow.

• Creates utils/general.py to hold some general utilities
  • Creates the render_jira_config function
  • Creates the get_file_conents function
  • Adds unit tests to test the new functions
• Removes unneeded "Copyright" comments in modified files (will write a subsequent PR to remove all of these)
• Moves the Jinja template used for the Jira config from a file to a constant in utils/const.py. Did this to avoid needing to provide a path to the template.

[redhat-qe-bot1]

Report bugs in Issues

The following are automatically added:

• Add reviewers from OWNER file (in the root of the repository) under reviewers section.
• Set PR size label.
• New issue is created for the PR. (Closed when PR is merged/closed)
• Run pre-commit if .pre-commit-config.yaml exists in the repo.

Available user actions:

• To mark PR as WIP comment /wip to the PR, To remove it from the PR comment /wip cancel to the PR.
• To block merging of PR comment /hold, To un-block merging of PR comment /hold cancel.
• To mark PR as verified comment /verified to the PR, to un-verify comment /verified cancel to the PR.
  verified label removed on each new commit push.
• To cherry pick a merged PR comment /cherry-pick <target branch to cherry-pick to> in the PR.
  • Multiple target branches can be cherry-picked, separated by spaces. (/cherry-pick branch1 branch2)
  • Cherry-pick will be started when PR is merged
• To build and push container image command /build-and-push-container in the PR (tag will be the PR number).
• To add a label by comment use /<label name>, to remove, use /<label name> cancel
• To assign reviewers based on OWNERS file use /assign-reviewers
• To check if PR can be merged use /check-can-merge

Supported /retest check runs

Supported labels

• hold
• verified
• wip
• lgtm

[calebevans]

/wip

[myakove]

@calebevans is this PR still needed?