Add users.data.root group only to data group not user group

There was a bug in the original implementation. When creating the groups in entitlements, users.data.root group was added to all the users and data groups. This is causing 2 issues :

1. members of the users.data.root groups will have full control over the data groups as well as the users groups. We only want to provide data management rights of the data groups only. We don't want to give extra permissions to the users.data.root members.
2. Adding "users.data.root" group to every users group is causing the 5000 quota limit to fill up very soon.

To address the above issues, we have decoupled the data management rights of the users group and adding "users.data.root" group to only data groups.