fix(json import): json scope is incorrect

Author: ehdsouza

ibm_cloud_sdk_core/base_service.py

@@ -301,7 +301,7 @@ def request(self, method, url, accept_json=False, headers=None,
 
         # Support versions of requests older than 2.4.2 without the json input
         if not data and json is not None:
-            data = json.dumps(json)
+            data = json_import.dumps(json)
             headers.update({'content-type': 'application/json'})
 
         auth = None