cloud-infra: Create jobs to verify Kubernetes 1.19 and 1.20

Kubernetes versions 1.19 and 1.20 will be brought into Nordix and
repos infra/stack/kubernetes and infra/installer/kubespray will be
branched off to support the versions.

This change creates jobs for the new Kubernetes versions and corresponding
branches.

Change-Id: I653ee596d314ba1141e9df13cf38cc505b06581d
3 files changed
tree: 32ee0804dee67f9ff8608c13b0148e53dfff2884
  1. jjb/
  2. .gitignore
  3. .gitreview
  4. .yamllint
  5. tox.ini