UnsafeIPAddress: Implement __(g|s)etstate__ and to ensure proper (un)pickling
Missing attributes in instance created by pickle.load cause AttributeError in
second part of ipa-server-install --external-ca.
https://fedorahosted.org/freeipa/ticket/6385
Reviewed-By: Martin Basti <mbasti@redhat.com>
Reviewed-By: Jan Cholasta <jcholast@redhat.com>