topology: check topology in ipa-replica-manage del
ipa-replica-manage del now:
- checks the whole current topology(before deletion), reports issues
- simulates deletion of server and checks the topology again, reports issues
Asks admin if he wants to continue with the deletion if any errors are found.
https://fedorahosted.org/freeipa/ticket/4302
Reviewed-By: David Kupka <dkupka@redhat.com>