[OSP 12] - Minor update fails if non-default stack name (overcloud) is used

Issue

• Minor update fails with the following warnring: [WARNING]: Could not match supplied host pattern, ignoring: Controller', u'ERROR! Specified --limit does not match any hosts'
• The following command fails: "openstack overcloud update stack --stack test123 --nodes Controller" when using a non default stack name.
• ~stack/tripleo-ansible-inventory is missing the overcloud inventory details.