Migrate CAMSM and BRM tests to Parametrized

Migrate the two other state machine unit tests suites to use the builtin
JUnit parametrized runner. Also remove the old StateMachineTestBase
class.

Test: unit tests
Change-Id: Ib4e2f0cfd1bfd53aae64aaeedee6e6d86c81359e
Merged-In: Ib4e2f0cfd1bfd53aae64aaeedee6e6d86c81359e