User plugin: do not return the SID on user creation

The SID is not part of the default user attributes and does not
need to be returned in the user-add output.

Related: https://pagure.io/freeipa/issue/8995
Reviewed-By: Christian Heimes <cheimes@redhat.com>
Reviewed-By: Rob Crittenden <rcritten@redhat.com>
Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>

ipaserver/plugins/user.py

@@ -659,6 +659,10 @@ class user_add(baseuser_add):
 
         entry_attrs.update(newentry)
 
+        # delete ipantsecurityidentifier if present
+        if ('ipantsecurityidentifier' in entry_attrs):
+            del entry_attrs['ipantsecurityidentifier']
+
         if options.get('random', False):
             try:
                 entry_attrs['randompassword'] = unicode(getattr(context, 'randompassword'))