Enable ipa_memcached when upgrading
    
    Add support for autobind to services. This is a bit of a special case
    so I currently require the caller to specify ldapi separately. It only
    makes sense to do this only in upgrade cases.
    
    Also uninstall ipa_memcached when uninstalling the server.
    
    https://fedorahosted.org/freeipa/ticket/2399