ipatests: Fix incorrect UID/GID reference for subdomain users and groups
    
    In legacy client integration test, the test cases that query information
    from subdomain about subdomain users and group expected subdomain
    users and groups to have the UIDs/GIDs as users and groups in the root
    domain.
    
    Reviewed-By: Petr Viktorin <pviktori@redhat.com>