ISPN-4638 Add ability to remove filter/converter factories

* Extension manager service should allow for filter/converter factories
to be removed when their undeployed (via their service stop() method).
* Extension manager service should allow for Hot Rod servers to be
removed when their removed (via their service stop() method).
ISPN-2056 Add component stop exception test caused by cache store
ISPN-3836 Stop TX reaper thread classloader leakage

Use a single ThreadFactory implementation across the project.