Automatic merge from submit-queue

A few changes to federated-service e2e test.

Most of the changes that get the test to pass have been made already or
elsewhere.  Here we restructure a bit fixing a nesting problem, extend the
timeouts, and start creating distinct backend pods that I'll delete in the
non-local test (coming shortly).

Also some extra debugging info in the DNS code.  I made some upstream
changes to skydns in https://github.com/skynetservices/skydns/pull/283

For #27739

Includes a commit from @madhusudancs that I will remove once his merges.