[meta] add support for helm 2.17.0 and k8s 1.17 (#880)

- Bump Helm version used in tests from 2.16.2 to 2.17.0
- Add CI tests on GKE 1.17

README.md

@@ -76,7 +76,7 @@ exact versions are defined under `KUBERNETES_VERSIONS` in
 ### Helm versions
 
 While we are checking backward compatibility, the charts are only tested with
-Helm version mentioned in [helm-tester Dockerfile][] (currently 2.16.12).
+Helm version mentioned in [helm-tester Dockerfile][] (currently 2.17.0).
 
 #### Helm 3 beta
 

helpers/helm-tester/Dockerfile

@@ -1,6 +1,6 @@
 FROM python:3.7
 
-ENV HELM_VERSION=2.16.12
+ENV HELM_VERSION=2.17.0
 
 RUN wget --no-verbose https://storage.googleapis.com/kubernetes-helm/helm-v${HELM_VERSION}-linux-amd64.tar.gz && \
     tar xfv helm-v${HELM_VERSION}-linux-amd64.tar.gz && \

helpers/matrix.yml

@@ -36,3 +36,4 @@ APM_SERVER_SUITE:
 KUBERNETES_VERSION:
   - '1.15'
   - '1.16'
+  - '1.17'

helpers/terraform/Dockerfile

@@ -3,7 +3,7 @@ FROM centos:7
 ENV VAULT_VERSION 0.9.3
 ENV TERRAFORM_VERSION=0.11.7
 ENV KUBECTL_VERSION=1.16.10
-ENV HELM_VERSION=2.16.12
+ENV HELM_VERSION=2.17.0
 ENV DOCKER_VERSION=18.09.7
 ENV JQ_VERSION=1.6