Properly bootstrap replica promotion api
    
    Properly bootstrap api in replica promote_check() so that it can
    be used later in the installation for setting up dns.
    
    https://fedorahosted.org/freeipa/ticket/6392
    
    Reviewed-By: Martin Basti <mbasti@redhat.com>
    Reviewed-By: Jan Cholasta <jcholast@redhat.com>