Publish zones only after all LDAP events have been processed.
    
    Zones are not exposed in _default DNS view until all events
    generated before LDAP intermediate message have been processed.
    
    This prevents BIND from returning NXDOMAIN for some names from
    a zone but NOERROR answers for other names in the same zone.
    It would be pretty confusing and not easy to debug.
    
    Signed-off-by: Petr Spacek <pspacek@redhat.com>