[install]fix the wrong output of "domain_id"
[install]fix the wrong output of "domain_id"

Change-Id: Ic1d91638257e0b8d104429fc1a871fd0c42f8844
Closes-Bug: #1560828

AlekhyaMallina-Vedams/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,openstack/openstack-manuals