Normalize variable naming in cloudformation_facts module using camel2snake

cloud/amazon/cloudformation_facts.py

@@ -257,6 +257,11 @@ def main():
         facts['stack_outputs'] = to_dict(facts['stack_description'].get('Outputs'), 'OutputKey', 'OutputValue')
         facts['stack_parameters'] = to_dict(facts['stack_description'].get('Parameters'), 'ParameterKey', 'ParameterValue')
 
+    # normalize stack description API output
+    facts['stack_description'] = camel_dict_to_snake_dict(facts['stack_description'])
+    # camel2snake doesn't handle NotificationARNs properly, so let's fix that
+    facts['stack_description']['notification_arns'] = facts['stack_description'].pop('notification_ar_ns', [])
+
     # Create optional stack outputs
     all_facts = module.params.get('all_facts')
     if all_facts or module.params.get('stack_resources'):