Change mkdir logic in DNSSEC
    
    - Create /var/named/dyndb-ldap/ipa/master/ early
    - Assume that /var/named/dyndb-ldap/ipa/master/ exists in BINDMgr.sync()
    
    Signed-off-by: Christian Heimes <cheimes@redhat.com>
    Reviewed-By: Alexander Bokovoy <abokovoy@redhat.com>