Use Docker 19.03.8 with Kops 1.17

[hakman]

Kubernetes 1.17 was validated against Docker 19.03, no specific version mentioned in the release notes, but the website mentioned Docker 19.03.4 with contained 1.2.10:

Update the latest validated version of Docker to 19.03 (#84476, @neolit123)

Since then, Docker released a few more versions, latest being Docker 19.03.8 with containerd 1.2.13. Both are patch releases with useful bugfixes:

• https://docs.docker.com/engine/release-notes/#19038
• https://github.com/containerd/containerd/releases/tag/v1.2.13

My proposal would be to release Kops 1.17 with Docker 19.03.8 as the default.

/cc @justinsb

[k8s-ci-robot]

@hakman: You must be a member of the kubernetes/kops-maintainers GitHub team to set the milestone. If you believe you should be able to issue the /milestone command, please contact your Kops Maintainers and have them propose you as an additional delegate for this responsibility.

In response to this:

/milestone 1.18

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.

[hakman]

Fixed by #8845.