This adds additional functional tests for the commands API.
It also restructures the current functional test to run in
sequence as a monolithic test to preserve IPA state and test
order between test runs. The time to wait for IPA to start
was increased due to an intermittent race condition that
occurs with the larger test suite.
Partial-Bug: 1492036
Change-Id: Iff9b41fb531d34225d702b9bfd39826e3c7195ad
4a7b954d14