no-jira: add fields as required parameter

Author: Adam Soos

rosette/api.py

@@ -363,7 +363,7 @@ def __init__(self):
 
     def validate(self):
         """Internal. Do not use."""
-        for option in ["records"]:  # required
+        for option in ["records","fields"]:  # required
             if self[option] is None:
                 raise RosetteException(
                     "missingParameter",