dqpublisher manager bug fixes
dqpublisher manager bug fixes

Only invoke the application on create callback if it is not NULL. This avoids
core dumps if the application does not provide a callback.

The manager was not maintaining the publisher map correctly. It allocated new
entries when an entry already existed, and did not remove entries properly.

Create the CM subscription after the other objects are created. Creating it
early could result in CM requests invoking callbacks before the manager fully
initializes.

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

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