Prepare Crust for end to end tests via Routing

[povilasb]

Once we're done with the 0.32.0 changes, we will test Crust for regressions.

1. Integtrate Crust into Routing
2. notify QA team to execute the end-to-end tests

[povilasb]

I've successfully integrated Crust into Routing masterbranch which is supposed to act the same as on our alpha-2 network. I pushed a separate branch update-crust into my personal routing fork: https://github.com/povilasb/routing/tree/update-crust

So in order to run the tests, one should build Vault with this routing version. Which should only require to change the routing version in Cargo.toml:

routing  = { git = "https://github.com/povilasb/routing", rev = "update-crust" }

It is possible that some dependencies might conflict, then you need to updated other dependencies in Vault's Cargo.toml as well.

[S-Coyle]

QA in progress test notes - https://gist.github.com/S-Coyle/976b319af63dee8656994e375f154acb

[S-Coyle]

Note that end to end tests are on hold until the droplet deployer tool is working