- Skip two chronically flakey tests.
- Remove t.Parallel: this slows down the tests, but makes them
more reliable. Increase test timeout to compensate.
- Increase recommended node count. This reduces the amount of
ResourceExhausted RPCs.
- Fix waitFor error to actually print time, instead of a
memory address.
- Add healthcheck stop to cleanup.
- Standardize cleanup name.
- Increase query timeout to 5m across the board to compensate
for multiple tests running queries in the instance.

Change-Id: I37413bbcbb171c17eea7f602665b5e05b643a428
Reviewed-on: https://code-review.googlesource.com/c/34830


Reviewed-by: Eno Compton <enocom@google.com>