Installer should always wait until CA starts up
    
    Patch for ticket 3964 changed the installer so that it does not
    always wait for CA if the proxy is not configured. However,
    it was found out that it may freeze an installation when
    a step subsequent after CA restart call the CA and receives no
    reply.
    
    Change the wait so that it always waits for CA to start up. If
    HTTP proxy is already configured, it should wait on port 443.
    If not, it should wait on local PKI port 8443.
    
    https://fedorahosted.org/freeipa/ticket/3973