Merge pull request #4845 from ryanpetrello/cli-fix-ujt-allow

cli: fix `awx unified_job_templates`

Reviewed-by: https://github.com/apps/softwarefactory-project-zuul

awxkit/awxkit/cli/options.py

@@ -91,7 +91,7 @@ class ResourceOptionsParser(object):
     def get_allowed_options(self):
         self.allowed_options = self.page.connection.options(
             self.page.endpoint + '1'
-        ).headers['Allow'].split(', ')
+        ).headers.get('Allow', '').split(', ')
 
     def build_list_actions(self):
         action_map = {