Migrate more tool shed functional testing to Galaxy API

[jmchilton]

This includes checking for updates and repository installation.

This means better testing of the endpoints we use from ephemeris and in the UI as well as the ability to delete a bunch of cruft I insisted we keep around just for testing (so that we would test the backend below aforementioned cruft).

How to test the changes?

(Select all options that apply)

• I've included appropriate automated tests.
• This is a refactoring of components with existing test coverage.
• Instructions for manual testing are as follows:
  1. [add testing steps and prerequisites here if you didn't write automated tests covering all your changes]

License

• I agree to license these and all my past contributions to the core galaxy codebase under the MIT license.