Scottx611x/fix add users to public group timeout (#2996)

* Only add a User to the Public Group if they aren't already a member

* Only add user to neo4j upon initial User creation

* Revert "Only add a User to the Public Group if they aren't already a member"

This reverts commit 12f53c6.

* Constrain User addition and annotatio set updating neo4j to active users only;
We still need to run this code for all active users during provisioning because the Neo4J database is recreated each time

* Reverse logic to check if a User is active and add logger

refinery/core/models.py

@@ -1978,6 +1978,10 @@ def save(self, *arg, **kwargs):
 def _add_user_to_neo4j(sender, **kwargs):
     user = kwargs['instance']
 
+    if not user.is_active:
+        logger.debug("User: %s has not been activated. Not adding them to "
+                     "Neo4J.", user.username)
+        return
     add_or_update_user_to_neo4j(user.id, user.username)
     add_read_access_in_neo4j(
         map(