Fix missing config.ips in promote_check

When replica is installed with --setup-dns config.ips is not defined.

https://fedorahosted.org/freeipa/ticket/5814

Reviewed-By: David Kupka <dkupka@redhat.com>

ipaserver/install/server/replicainstall.py

@@ -1308,6 +1308,7 @@ def promote_check(installer):
         if options.setup_dns:
             dns.install_check(False, remote_api, True, options,
                               config.host_name)
+            config.ips = dns.ip_addresses
         else:
             config.ips = installutils.get_server_ip_address(
                 config.host_name, not installer.interactive,