BC-8614 Reduce NBC group size limit to mitigate timeouts (#1067)

Users with groups containing fewer than 1000 members are still
experiencing login issues. To address this, we are halving the group
size limit to further reduce timeouts.

ansible/group_vars/all/config.yml

@@ -1080,7 +1080,7 @@ configuration_all:
     client: false
     nuxtclient: false
   PROVISIONING_SCHULCONNEX_GROUP_USERS_LIMIT:
-    value: "1000"
+    value: "500"
     server: true
     client: false
     nuxtclient: false