This patch implements most of the del_master_managed() functionality as a part
of `server-del` command.
`server-del` nows performs these actions:
* check topology connectivity
* check that at least one CA/DNS server and DNSSec masters are left
after removal
* cleanup all LDAP entries/attributes exposing information about the master
* cleanup master DNS records
* remove master and service principals
* remove master entry from LDAP
* check that all segments pointing to the master were removed
`server-del` now accepts the following options:
* `--force`: force master removal even if it doesn't exist
* `--ignore-topology-disconnect`: ignore errors arising from disconnected
topology before and after master removal
* `--ignore-last-of-role`: remove master even if it is last DNS server,
and DNSSec key master. The last CA will *not* be removed regardless of
this option.
https://fedorahosted.org/freeipa/ticket/5588
Reviewed-By: Martin Basti <mbasti@redhat.com>
