need set hostname by kubeadm

Update vsphere.md

Fix some typos

fix typo

[contrib/terraform/openstack] Add support for router less deployments

Add bin_dir to kubectl version check

Upstream Changes:

-   ingress-nginx 0.20.0 (https://github.com/kubernetes/ingress-nginx/releases/tag/nginx-0.20.0)

Our Changes:

-   Sync templates with upstream changes

kubeadm sets node label node-role.kubernetes.io/master=''
and this is not configurable. We should use it everywhere.

Fix typo

* codestyle tests

* Download destination can be different than local_release_dir

Fix missing s in link to kube-router docs

[contrib/terraform/openstack] Add list of know working OpenStack clouds

kube-router v0.2.1 highlights from changelog:
- IPv6 WIP but pretty close to full working functionality
- fully support network policy semantics with addition of support for
  ipblock and except

* warning on meta flush_handlers

* avoid rm

* avoid "Module remote_tmp /root/.ansible/tmp did not exist and was created with a mode of 0700, this may cause issues when running as another user. To avoid this, create the remote_tmp dir with the correct permissions manually" warning on subsequent tasks using blockinfile

* is match

 [jjo] improve contrib/dind/run-test-distros.sh via spec files