Add LDAP server fallback to client installer
Change the discovery code to validate all servers, regardless of where
the originated (either via SRV records or --server). This will prevent
the client installer from failing if one of those records points to a
server that is either not running or is not an IPA server.
If a server is not available it is not removed from the list of configured
servers, simply moved to the end of the list.
If a server is not an IPA server it is removed.
https://fedorahosted.org/freeipa/ticket/3388