fixed missing package in docker container

Author: khultman

gremlinapi/http_clients.py

@@ -117,6 +117,5 @@ def get_gremlin_httpclient():
     if requests:
         return GremlineAPIRequestsClient
     else:
-        #return GremlinAPIurllibClient
-        return GremlineAPIRequestsClient
+        return GremlinAPIurllibClient