Ensure log messages have valid json

- Fix messages getting contatenated at 8k
 - Fix rsyslog cutting off the opening brace of log messages
 - Make valid default conf and emit logs based on prescence of .sock and
 settings

awx/main/utils/handlers.py

@@ -14,6 +14,8 @@ class RSysLogHandler(logging.handlers.SysLogHandler):
     append_nul = False
 
     def emit(self, msg):
+        if not settings.LOG_AGGREGATOR_ENABLED:
+            return
         if not os.path.exists(settings.LOGGING['handlers']['external_logger']['address']):
             return
         return super(RSysLogHandler, self).emit(msg)