Convert service and servicegroup to objects

This converts service and servicegroup to use objects instead of
proxying through conductor.

A cleanup is added to object tests that change the indirection_api
because other tests that run services might otherwise be affected
by it.

Related to blueprint kilo-objects

Change-Id: I87b077699c2ecbc25a83e5844e8c69fe147cec01
Remove and deprecate unused conductor service calls

A previous change converted service and servicegroup to objects.
This change removes the now unused methods from conductor.

Related to blueprint kilo-objects

Change-Id: I3e35598ec89b18d1121547caa37ec5dbc506cb06
Refactor some service tests and make them not require db

This refactors service tests in a few different ways:

 - Remove unnecessary calls
 - Make tests test what they say instead of something that other tests
   already cover (make TestLauncher into something else than testing
   what test_service_random_port already does)
 - Make them not require db

Change-Id: Ic2dfbc0d2ccf7a1f71929b78d7c7d784a2f8b7f5