Replace tripleo-scenario003-multinode with scenario003-standalone
Replace tripleo-scenario003-multinode with scenario003-standalone

Change-Id: I872dd928302b2b3e1bc3d0cf44fbba2251aa4b7a
Story: https://tree.taiga.io/project/tripleo-ci-board/us/533

openstack/tripleo-common,openstack/tripleo-common