switch to readign json instead of using as_request function

certificate_requests.py

@@ -52,9 +52,9 @@ class RequestLoader(object):
                 stream,
             )
 
-            requester = request_data.get('userName', None) or request_data.get('hostName', None)
-            root_requested = request_data.get('rootRequested', False)
-            key_data = request_data.get('keyData', None)
+            requester = request_data['request'].get('userName', None) or request_data.get('hostName', None)
+            root_requested = request_data['request'].get('rootRequested', False)
+            key_data = request_data['request'].get('keyData', None)
 
             # attribute cannot be read from
             # json, must add after decoding