Fixing CA certificate locations for k8s components

Configurable docker yum repos, systemd fix

* Include /opt/bin in PATH for host deployed kubelet on CoreOS

* Removing conditional check for CoreOS

* Added update CA trust step for etcd and kube/secrets roles

* Added load_balancer_domain_name to certificate alt names if defined. Reset CA's in RedHat os.

* Rename kube-cluster-ca.crt to vault-ca.crt, we need separated CA`s for vault, etcd and kube.

* Vault role refactoring, remove optional cert vault auth because not not used and worked. Create separate CA`s fro vault and etcd.

* Fixed different certificates set for vault cert_managment

* Update doc/vault.md

* Fixed condition create vault CA, wrong group

* Fixed missing etcd_cert_path mount for rkt deployment type. Distribute vault roles for all vault hosts

* Removed wrong when condition in create etcd role vault tasks.

Fix upgrade for canal and apiserver cert

Fixes #1573

update calico version

update calico releases link

* Updates Controller Manager/Kubelet with Flannel's required configuration for CNI
* Removes old Flannel installation
* Install CNI enabled Flannel DaemonSet/ConfigMap/CNI bins and config (with portmap plugin) on host
* Uses RBAC if enabled
* Fixed an issue that could occur if br_netfilter is not a module and net.bridge.bridge-nf-call-iptables sysctl was not set

Update Calico to 2.4.1 release.

* Added private key file to ssh bastion conf

* Used regular if condition insted of inline conditional

Enable scheduling of critical pods and network plugins on master

Added toleration to DNS, netchecker, fluentd, canal, and
calico policy.

Also small fixes to make yamllint pass.

* Adding yaml linter to ci check

* Minor linting fixes from yamllint

* Changing CI to install python pkgs from requirements.txt

- adding in a secondary requirements.txt for tests
- moving yamllint to tests requirements

If Kubernetes > 1.6 register standalone master nodes w/ a
node-role.kubernetes.io/master=:NoSchedule taint to allow
for more flexible scheduling rather than just marking unschedulable.

Prior this would fail because we didnt set max ttl for vault temp

- Switched Calico images to be pulled from quay.io
- Updated Canal too

Add node to docs about kubelet deployment type changes

Change kubelet deploy mode to host
Enable cri and qos per cgroup for kubelet
Update CoreOS images
Add upgrade hook for switching from kubelet deployment from docker to host.
Bump machine type for ubuntu-rkt-sep

[WIP] Support pbr builds and prepare for RPM packaging as the ansible-kubespray artifact

* Fix Typo etc3 -> etcd3

* Fix typo in post-upgrade of master. stop -> start

* Added custom ips to etcd vault distributed certificates

* Added custom ips to kube-master vault distributed certificates

* Added comment about issue_cert_copy_ca var in vault/issue_cert role file

* Generate kube-proxy, controller-manager and scheduler certificates by vault

* Revert "Disable vault from CI (#1546)"

This reverts commit 781f31d2.

* Fixed upgrade cluster with vault cert manager

* Remove vault dir in reset playbook

add possibility to ignore the hostname override

Signed-off-by: Bogdan Dobrelya <bogdando@mail.ru>