UI: Fixed many automation issues
travis fix: fixed the unused import
Merge pull request #1142 from kbidarkar/fix-automation-tests5

UI: Fixed many automation issues
Extend instance method ActivationKey.path

Allow a client to request the "releases" path from an activation key. This path
is in the following format:

    /activation_keys/<id>/releases

Add tests for this new functionality. Add the newly-created module of tests to
the API documentation.
Add tests targeting BZ bug 1112717

Check whether it is possible to create an activation key and fetch its releases.