Free CM Subscription in Destroy Callback
Free CM Subscription in Destroy Callback

The CM subscription can not be freed until it destruction completes and invokes
the onDestroy() callback. This avoids potential core dumps on cleanup.

Signed-off-by: Mike Schonberg <a0b795d7498c6bea81956c992e86c1008615b63d@nyx.com>

fquinner/OpenMAMA,dmagOM/OpenMAMA-dynamic,fquinner/OpenMAMA,fquinner/OpenMAMA,jacobraj/MAMA,fquinner/OpenMAMA,dmagOM/OpenMAMA-dynamic,MattMulhern/OpenMAMA,MattMulhern/OpenMamaCassandra,dmaguire/OpenMAMA,philippreston/OpenMAMA,dpauls/OpenMAMA,dmaguire/OpenMAMA,dmagOM/OpenMAMA-dynamic,jacobraj/MAMA,MattMulhern/OpenMAMA,vulcanft/openmama,cloudsmith-io/openmama,jacobraj/MAMA,vulcanft/openmama,MattMulhern/OpenMAMA,philippreston/OpenMAMA,kuangtu/OpenMAMA,dmaguire/OpenMAMA,dmagOM/OpenMAMA-dynamic,MattMulhern/OpenMamaCassandra,cloudsmith-io/openmama,philippreston/OpenMAMA,dpauls/OpenMAMA,philippreston/OpenMAMA,dmaguire/OpenMAMA,philippreston/OpenMAMA,dmaguire/OpenMAMA,vulcanft/openmama,jacobraj/MAMA,cloudsmith-io/openmama,kuangtu/OpenMAMA,vulcanft/openmama,dmaguire/OpenMAMA,fquinner/OpenMAMA,MattMulhern/OpenMAMA,cloudsmith-io/openmama,MattMulhern/OpenMAMA,cloudsmith-io/openmama,dpauls/OpenMAMA,vulcanft/openmama,kuangtu/OpenMAMA,kuangtu/OpenMAMA,cloudsmith-io/openmama,dmagOM/OpenMAMA-dynamic,philippreston/OpenMAMA,kuangtu/OpenMAMA,kuangtu/OpenMAMA,vulcanft/openmama,jacobraj/MAMA,fquinner/OpenMAMA,jacobraj/MAMA,vulcanft/openmama,dmagOM/OpenMAMA-dynamic,MattMulhern/OpenMamaCassandra,MattMulhern/OpenMamaCassandra,dpauls/OpenMAMA,dmaguire/OpenMAMA,dpauls/OpenMAMA,kuangtu/OpenMAMA,MattMulhern/OpenMAMA,philippreston/OpenMAMA,fquinner/OpenMAMA,MattMulhern/OpenMamaCassandra,MattMulhern/OpenMamaCassandra,dpauls/OpenMAMA,cloudsmith-io/openmama,dpauls/OpenMAMA,MattMulhern/OpenMAMA