Use RELEASE_IMAGE_LATEST for CVO payload

Author: smarterclayton

ci-operator/templates/openshift/installer/cluster-launch-installer-e2e.yaml

@@ -25,6 +25,7 @@ parameters:
 # Ensures the release image is created and tested
 - name: TEST_COMMAND
 - name: RELEASE_IMAGE_LATEST
+  required: true
 
 objects:
 
@@ -228,6 +229,8 @@ objects:
         value: aws
       - name: OPENSHIFT_INSTALL_AWS_REGION
         value: us-east-1
+      - name: OPENSHIFT_INSTALL_RELEASE_IMAGE_OVERRIDE
+        value: ${RELEASE_IMAGE_LATEST}
       command:
       - /bin/openshift-install
       - --dir=/tmp/artifacts/installer