Fix minor reference leaks in app_skel and TEST_FRAMEWORK

* Cleanup games object in app_skel.
* Cleanup stasis subscription to TEST_FRAMEWORK in manager.c (12+).

Review: https://reviewboard.asterisk.org/r/3757/


git-svn-id: http://svn.asterisk.org/svn/asterisk/branches/11@418465 f38db490-d61c-443f-a65b-d21fe96a405b