Streamline some tests

Move logic testing of validators from the UI tests to unit.
Don't test Hibernate email logic.
Add a small check on goToHome to make sure we actually got home.
Remove RetryRule - was causing more problems than it fixed, such as altering failure reasons and hiding real failures.
Add webhooks to test plan, move project tests to separate class.
Shift login actions to a single step where possible.
Sorry, it looks like you did; I couldn't tell exactly what the mechanics of the test were.  If so, great, but in that case the test would be better placed in zanata-war, since it's using zanata-war's implementation classes.  As I said, that way the responsible developer will found out sooner if something breaks.