Fixed wrong cinder store user name
Fixed wrong cinder store user name

The value for 'cinder_store_user_name' should be only user name
instead of tenant:username

Changing value of 'cinder_store_user_name' to 'glance' from
'service:glance'

Change-Id: Idbc3541564fb405d60cf3dcc01960fd5e0befb97
Closes-Bug: #1809104

openstack/tripleo-heat-templates,openstack/tripleo-heat-templates