Comment designate options at globals.yml

Designate options are uncommented in globals while in group_vars/all
are uncommented too.

This change comment designate options to maintain similar style
in globals.yml with other services.

TrivialFix

Change-Id: Iab36590e2eaa60580f438fe73dd5237b43b70ee9

etc/kolla/globals.yml

@@ -285,8 +285,8 @@ kolla_internal_vip_address: "10.10.10.254"
 # Designate options
 #######################
 # Valid options are [ bind9 ]
-designate_backend: "bind9"
-designate_ns_record: "sample.openstack.org"
+#designate_backend: "bind9"
+#designate_ns_record: "sample.openstack.org"
 
 #########################
 # Nova - Compute Options