Cleanup running conductor services in tests

The conductor manager tests are not stopping services that are
started, instead relying strickly on database cleanup.  This is
causing condcutor periodic tasks to bleed into other test cases
and cause occasional unrelated deadlocks in logging later on during
test runs.

Change-Id: I7502df5dec7c42fe1a20bebad8f9ad393572d17d
Closes-bug: #1300420
Merge "Cleanup running conductor services in tests"