Repo Creation Service and supporting multiple open phases

## On supporting multiple open phases

Current phase is set to be the first element in the array of openPhases.
In the case where an `admin` would like to view issues in the `testerResponse` phase for example, they would need to create a bug-reporting repo in order to log in, which they do not have the permission to. Therefore the `admin` will be blocked from logging in.

If we would like to support multiple open phases, I think we might need to redefine the logic for `verifyRepoCreationPermissions()`, which blocks all other roles from logging in during the bug reporting phase

Start by tracing verifyRepoCreationPermissions and how openPhases determines the current phase, then inspect the login and repo-creation flow. Done means admins can log in during testerResponse without creating a bug-reporting repository, while multiple open phases remain supported.

Written by the indexing model from the issue text.