Use correct service name
Use correct service name

Update patch #151729 to use 'Image Service' instead of 'glance'
for service name.

Change-Id: I70e1232b41c51b0efb6249f93ad8e006f0f57f4a
Closes-Bug: #1404956
backport: juno

potsmaster/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,potsmaster/openstack-manuals,Akasurde/openstack-manuals,saeki-masaki/openstack-manuals,gongysh2004/openstack-manual,AlekhyaMallina-Vedams/openstack-manuals,AlekhyaMallina-Vedams/openstack-manuals,kairoaraujo/openstack-manuals,openstack/openstack-manuals,saeki-masaki/openstack-manuals,openstack/openstack-manuals,Akasurde/openstack-manuals,openstack/openstack-manuals,openstack/openstack-manuals,kairoaraujo/openstack-manuals,gongysh2004/openstack-manual