tools: Fix permissions for users added by engine-manage-domains

Fix permissions for users added by engine-manage-domains by setting
last_admin_check_status to true. The same is done in
AddPermissionCommand if admin role is assigned to user.

Change-Id: Id7565f00d26cf641efd82aa5508deece9f4ee7cf
Bug-Url: https://bugzilla.redhat.com/1057087
Signed-off-by: Martin Perina <mperina@redhat.com>