Automatic merge from submit-queue
Fix federation e2e tests by correctly managing cluster clients
1. The main fix: Correct overall BeforeEach() to create a new set of cluster clients, rather than just append to the set created by all previous tests. This was screwing up a lot of stuff in difficult to diagnose ways.
2. Add lots of debug logging.
3. Be better about cleaning up after each test.
```
SUCCESS! -- 6 Passed | 0 Failed :-)
```
cc @nikhiljindal @madhusudancs @mfanjie @colhom FYI