fix(detailedresponse): Check if it is a json

Author: ehdsouza

watson_developer_cloud/watson_service.py

@@ -157,7 +157,7 @@ def get_headers(self):
     def _to_dict(self):
         _dict = {}
         if hasattr(self, 'result') and self.result is not None:
-            _dict['result'] = self.result
+            _dict['result'] = self.result if isinstance(self.result, dict) else 'Http response object'
         if hasattr(self, 'headers') and self.headers is not None:
             _dict['headers'] = self.headers
         return _dict