fix the connection check fix

* Multiple exceptions in except should be a tuple. Otherwise, the second
parameter will be the error object. Apposed to the intent, for it to be
another exception in a list of exceptions.

awx/fact/utils/connection.py

@@ -23,6 +23,6 @@ def test_mongo_connection():
                      tz_aware=settings.USE_TZ)
         db[settings.MONGO_DB].command('ping')
         return True
-    except ConnectionError, AutoReconnect:
+    except (ConnectionError, AutoReconnect):
         return False