When using ipa-replica-manage or ipa-csreplica-manage to delete an
agreement with a host we would try to make a connection to that host
prior to tryign to delete it. This meant that the trying to delete
a host we don't have an agreement with would return a connection
error instead of a "no agreement with host foo" error.
Also display a completed message when an agreement is removed.
https://fedorahosted.org/freeipa/ticket/2048https://fedorahosted.org/freeipa/ticket/2125