Fix the CI script

.gitlab-ci.yml

@@ -33,7 +33,7 @@ compile:
   variables:
     # The ansible vault only contains secret variables, cluster config itself
     # is set from the documentation inventory
-    ANSIBLE_ARGS: -i ../.ci-vault -i inventories/sample-cloud.yaml --vault-password-file /tmp/vault -e node_prefix=ci-$CI_JOB_ID
+    ANSIBLE_ARGS: -i ../.ci-vault -i inventories/sample-cloud.yaml --vault-password-file /tmp/vault -e $PROVIDER.prefix=ci-$CI_JOB_ID
 
 upload:
   stage: test