[mama] Free CM Subscription in Destroy Callback
[mama] 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.

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