Update helm 2 version to latest

The version of helm 2 that OSH has been using was older and seems
to have been removed from the googleapi repo that the jobs are
setup to use, this was causing job failures.

This change updates the version to the latest v2 release.

Change-Id: I675f539b24ea9c2355ac9eacc7dd8122c5236e5f

roles/build-helm-packages/defaults/main.yml

@@ -12,7 +12,7 @@
 
 ---
 version:
-  helm: v2.16.9
+  helm: v2.17.0
 url:
   google_helm_repo: https://storage.googleapis.com/kubernetes-helm
 ...

roles/build-images/defaults/main.yml

@@ -13,7 +13,7 @@
 ---
 version:
   kubernetes: v1.18.9
-  helm: v2.16.9
+  helm: v2.17.0
   cni: v0.8.5
 
 proxy:

tools/images/kubeadm-aio/Dockerfile

@@ -44,7 +44,7 @@ ENV CNI_VERSION ${CNI_VERSION}
 ARG CNI_REPO_URL=https://github.com/containernetworking/plugins/releases/download/$CNI_VERSION
 ENV CNI_REPO_URL ${CNI_REPO_URL}
 
-ARG HELM_VERSION="v2.16.9"
+ARG HELM_VERSION="v2.17.0"
 ENV HELM_VERSION ${HELM_VERSION}
 
 ARG CHARTS="calico,flannel,tiller,kube-dns,kubernetes-keystone-webhook"