Update handlers.py

The setFormatter tries to create the external.log file.. So we should check if LOG_AGGREGATOR_AUDIT is active here as well

awx/main/utils/handlers.py

@@ -294,6 +294,7 @@ class AWXProxyHandler(logging.Handler):
         super(AWXProxyHandler, self).__init__(**kwargs)
         self._handler = None
         self._old_kwargs = {}
+        if settings.LOG_AGGREGATOR_AUDIT:
             self._auditor = logging.handlers.RotatingFileHandler(
                 filename='/var/log/tower/external.log',
                 maxBytes=1024 * 1024 * 50, # 50 MB