Sanitize the cluster_name variable (#4509)

.gitlab-ci.yml

@@ -788,7 +788,7 @@ tf-packet-ubuntu16-default:
     TF_VERSION: 0.11.11
     PROVIDER: packet
     CLUSTER: $CI_COMMIT_REF_NAME
-    TF_VAR_cluster_name: $CI_COMMIT_REF_NAME
+    TF_VAR_cluster_name: $CI_COMMIT_REF_SLUG
     TF_VAR_number_of_k8s_masters: "1"
     TF_VAR_number_of_k8s_nodes: "1"
     TF_VAR_plan_k8s_masters: t1.small.x86
@@ -803,7 +803,7 @@ tf-packet-ubuntu18-default:
     TF_VERSION: 0.11.11
     PROVIDER: packet
     CLUSTER: $CI_COMMIT_REF_NAME
-    TF_VAR_cluster_name: $CI_COMMIT_REF_NAME
+    TF_VAR_cluster_name: $CI_COMMIT_REF_SLUG
     TF_VAR_number_of_k8s_masters: "1"
     TF_VAR_number_of_k8s_nodes: "1"
     TF_VAR_plan_k8s_masters: t1.small.x86
@@ -820,7 +820,7 @@ tf-apply-ovh:
     PROVIDER: openstack
     CLUSTER: $CI_COMMIT_REF_NAME
     ANSIBLE_TIMEOUT: "60"
-    TF_VAR_cluster_name: $CI_COMMIT_REF_NAME
+    TF_VAR_cluster_name: $CI_COMMIT_REF_SLUG
     TF_VAR_number_of_k8s_masters: "0"
     TF_VAR_number_of_k8s_masters_no_floating_ip: "1"
     TF_VAR_number_of_k8s_masters_no_floating_ip_no_etcd: "0"