Add Terraform configuration and upgrade helm version (#1194)

* Use terraform to manage ci cluster. Upgrade ci cluster to 1.13
* Upgrade helm version
* Do not break the test if no previous resources
* Do not skip install helm if helm is old version

hack/runtests.sh

@@ -8,6 +8,7 @@ else
     K="kubectl --kubeconfig $KUBECONFIG --namespace default"
     if $K get configmap ok-to-destroy
     then
+    set +e  # do not break if crd not found
     $K delete functions --all
     $K delete environments --all
     $K delete httptriggers --all
@@ -15,6 +16,7 @@ else
     $K delete messagequeuetriggers --all
     $K delete packages --all
     $K delete timetriggers --all
+    set -e
     fi
 fi
 

hack/travis-kube-setup.sh

@@ -14,9 +14,10 @@ then
 fi
 
 # Get helm
-if [ ! -f $K8SCLI_DIR/helm ]
+HELM_VERSION=2.14.0
+if [ ! -f $K8SCLI_DIR/helm ] || (helm version --client | grep -v $HELM_VERSION)
 then
-    curl -LO https://storage.googleapis.com/kubernetes-helm/helm-v2.7.2-linux-amd64.tar.gz
+    curl -LO https://storage.googleapis.com/kubernetes-helm/helm-v${HELM_VERSION}-linux-amd64.tar.gz
     tar xzvf helm-*.tar.gz
     mv linux-amd64/helm $K8SCLI_DIR/helm
 fi