Add gcloud to kubectl 1.17/Helm 3.5.3
This creates an image with the following components:
- Google Cloud SDK 354.0.0 - required in https://gitlab.com/gitlab-org/gitlab/blob/9f876cd20211fef97581912111d476200d18ad3c/.gitlab/ci/review.gitlab-ci.yml#L1-17
- kubectl 1.17.17
- helm 3.5.3
Closes #85 (closed)
Edited by Albert