Make the reload stasis message bump the ref count of its sub-object

JSON objects are reference stealing. Hence, if you've RAII_VAR'd some
subobject and want to pack it into another JSON object, you have to bump
the reference count. Using the 'O' option during the pack will bump the
reference count for you.

git-svn-id: http://svn.asterisk.org/svn/asterisk/trunk@391314 f38db490-d61c-443f-a65b-d21fe96a405b