Updated the tests according to the new replica installation workflow
    
    As of 4.3 the replica installation is performed without preparing a gpg file on
    master, but rather enrolling a future replica as a client with subsequent
    promotion of the client. This required the corresponding change in the
    integration tests
    
    https://fedorahosted.org/freeipa/ticket/5379
    
    Reviewed-By: Martin Basti <mbasti@redhat.com>