Revert "DNS Locations: do not generate location records for unused locations"
    
    This reverts commit bbf8227e3fd678d4bd6659a12055ba3dbe1c8230.
    
    After deeper investigation, we found out that empty locations are needed
    for clients, because clients may have cached records for longer time for
    that particular location. Only way how to remove location is to remove
    it using location-del
    
    https://fedorahosted.org/freeipa/ticket/2008
    
    Reviewed-By: Petr Spacek <pspacek@redhat.com>