Destroy the generic_monitors container after the core_instances in ccss

For each item in core_instances disposed of in the shutdown of ccss, any
generic monitor instances referenced by the objects will be removed from
generic_monitors during their destruction.  Hilarity ensues if
generic_monitors no longer exists.

Thanks to the Asterisk Test Suite's generic_ccss test for complaining loudly
when it ran into this.
........

Merged revisions 374300 from http://svn.asterisk.org/svn/asterisk/branches/10
........

Merged revisions 374301 from http://svn.asterisk.org/svn/asterisk/branches/11


git-svn-id: https://origsvn.digium.com/svn/asterisk/trunk@374302 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/ccss.c

@@ -4535,14 +4535,15 @@ static void cc_shutdown(void)
 	if (cc_core_taskprocessor) {
 		cc_core_taskprocessor = ast_taskprocessor_unreference(cc_core_taskprocessor);
 	}
-	if (generic_monitors) {
-		ao2_t_ref(generic_monitors, -1, "Unref generic_monitor container in cc_shutdown");
-		generic_monitors = NULL;
-	}
+	/* Note that core instances must be destroyed prior to the generic_monitors */
 	if (cc_core_instances) {
 		ao2_t_ref(cc_core_instances, -1, "Unref cc_core_instances container in cc_shutdown");
 		cc_core_instances = NULL;
 	}
+	if (generic_monitors) {
+		ao2_t_ref(generic_monitors, -1, "Unref generic_monitor container in cc_shutdown");
+		generic_monitors = NULL;
+	}
 }
 
 int ast_cc_init(void)