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/
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Merged revisions 418465 from http://svn.asterisk.org/svn/asterisk/branches/11


git-svn-id: http://svn.asterisk.org/svn/asterisk/branches/12@418466 f38db490-d61c-443f-a65b-d21fe96a405b