Updated kubernetes-apps helm installation

Added full path for helm

Adding /O=system:masters to admin certificate

Add support for different tags for netcheck containers

bootstrap task on centos missing packages

Updating calico to v2.1.4

mount os-release to ensure the node's OS is what's seen in k8s api

Fix link from ansible.md to calico.md

This commit fixes a broken link from ansible.md to calico.md.

Switch CI to ansible 2.3.0

Replace 'netcheck_tag' with 'netcheck_version' and add additional
'netcheck_server_tag' and 'netcheck_agent_tag' config options to
provide ability to use different tags for server and agent
containers.

Closes: 1253
Signed-off-by: Sergii Golovatiuk <sgolovatiuk@mirantis.com>

Ansible 2.3 support

- Fix when clauses in various places
- Update requirements.txt
- Fix README.md

Signed-off-by: Sergii Golovatiuk <sgolovatiuk@mirantis.com>

add MY_NODE_NAME variable into netchecker-agent environment

Specify a dir and attach it to helm for HELM_HOME

add some known tweaks that need to be made for coreos to docs

on centos.  The bootstrap tty fixup needs it.

allow for correct aws default resolver

Change DNS policy for kubernetes components

When VPC is used, external DNS might not be available. This patch change
behavior to use metadata service instead of external DNS when
upstream_dns_servers is not specified.

Signed-off-by: Sergii Golovatiuk <sgolovatiuk@mirantis.com>

According to code apiserver, scheduler, controller-manager, proxy don't
use resolution of objects they created. It's not harmful to change
policy to have external resolver.

Signed-off-by: Sergii Golovatiuk <sgolovatiuk@mirantis.com>

Move namespace file to template directory

Explicitly create cni bin dir

Fix IPS array variable expansion

Add tags to reset playbook and make iptables flush optional

kubernetesUnitPrefix was changed to k8s_* in 1.5. This patch reflects
this change in kargo

Fixes #1229

Add minimal k8s upgrade playbook

Remove and ignore .bak files

If this path doesnt exist, it will cause kubelet to fail to start when
using rkt