add created field

Author: markdentoom

hypernode_api_python/client.py

@@ -642,6 +642,7 @@ def get_active_branchers(self, app_name):
         >            {
         >                "id": 21,
         >                "name": "yourhypernodeappname-eph123456",
+        >                "created": "2019-08-24T14:15:22Z"
         >                "ip": "127.0.0.1",
         >                "elapsed_time": 7824,
         >                "description": "PHP version 7.1"
@@ -650,6 +651,7 @@ def get_active_branchers(self, app_name):
         >                "id": 22,
         >                "name": "yourhypernodeappname-eph654321",
         >                "ip": "52.68.96.58",
+        >                "created": "2019-08-24T14:15:22Z"
         >                "elapsed_time": 7224,
         >                "description": None
         >            }