Merge branch 'release_3.1.0' into devel

* release_3.1.0: (186 commits)
  check related credential for inventory source
  Fixed org jt's smart status
  Show the data that would have been a problem sending payload
  Implement optional message persistence on callback events
  changing the related tab on an edit of an organization to be for users, instead of users & teams
  fixing cancel function for workflow results
  Handle deleting root node while adding a child to that root node
  Skip sending task to process cache changes when migrating to database settings.
  only loop over project OPTIONS response if the response is valid
  Added the ability to pass in a maximum number of pages shown to pagination directive.  This is useful for narrow lists particularly in modals.
  fix a CTinT bug in static config parsing
  Recursively fetch workflow nodes when there is more than 1 page of nodes
  enforce a sane default OPT_NETWORK_TIMEOUT for LDAP connections
  Labels expects the iterator to be `template` not `job_template`
  Disable workflow editor save when currently adding a node
  Fixed up organizations/job templates list
  surface dry_run option for system jobs through the API
  fix bugs with system auditors and orphan JTs
  incorporating organization into the custom inv script option selection for a group
  catch and log LDAP auth plugin misconfigurations
  ...

awx/api/metadata.py

@@ -32,6 +32,7 @@ class Metadata(metadata.SimpleMetadata):
             'min_length', 'max_length',
             'min_value', 'max_value',
             'category', 'category_slug',
+            'defined_in_file'
         ]
 
         for attr in text_attrs:
@@ -156,6 +157,10 @@ class Metadata(metadata.SimpleMetadata):
 
                 # For PUT/POST methods, remove read-only fields.
                 if method in ('PUT', 'POST'):
+                    # This value should always be False for PUT/POST, so don't
+                    # show it (file-based read-only settings can't be updated)
+                    meta.pop('defined_in_file', False)
+
                     if meta.pop('read_only', False):
                         actions[method].pop(field)
 
@@ -187,6 +192,10 @@ class Metadata(metadata.SimpleMetadata):
         if getattr(view, 'related_search_fields', None):
             metadata['related_search_fields'] = view.related_search_fields
 
+        from rest_framework import generics
+        if isinstance(view, generics.ListAPIView) and hasattr(view, 'paginator'):
+            metadata['max_page_size'] = view.paginator.max_page_size
+
         return metadata