Hostname used by IPA must be a system hostname
    
    Make sure that the hostname IPA uses is a system hostname. If user
    passes a non-system hostname, update the network settings and
    system hostname in the same way that ipa-client-install does.
    
    This step should prevent various services failures which may not
    be ready to talk to IPA with non-system hostname.
    
    https://fedorahosted.org/freeipa/ticket/1931