Fix CCSS CLI commands and logger level not unregistered.

(issue ASTERISK-20649)
Reported by: Corey Farrell
Patches:
      ccss-cleanup-all.patch (license #5909) patch uploaded by Corey Farrell
........

Merged revisions 377037 from http://svn.asterisk.org/svn/asterisk/branches/1.8


git-svn-id: https://origsvn.digium.com/svn/asterisk/branches/10@377038 65c4cc65-6c06-0410-ace0-fbb531ad65f3

main/ccss.c

@@ -4491,6 +4491,8 @@ static void cc_shutdown(void)
 	ast_cc_monitor_unregister(&generic_monitor_cbs);
 	ast_unregister_application(cccancel_app);
 	ast_unregister_application(ccreq_app);
+	ast_logger_unregister_level(CC_LOGGER_LEVEL_NAME);
+	ast_cli_unregister_multiple(cc_cli, ARRAY_LEN(cc_cli));
 
 	if (cc_sched_context) {
 		ast_sched_context_destroy(cc_sched_context);