download v1.12.3 kubernetes images failed

it is used for join master or use --experimental-control-plane argments

- NOTE: it assumes that the 'latest' version is newer than 17.05

* Add images downloader to download roles

* Use single jinja2 templates

* add kube_version to templates

Signed-off-by: Ganesh Maharaj Mahalingam <ganesh.mahalingam@intel.com>

* add vars for cilium init container

* make yamllint happy

* add var cilium_init in downloads

Signed-off-by: Ganesh Maharaj Mahalingam <ganesh.mahalingam@intel.com>

* Metrics server resizer addon should target metrics server deployment

* Target metrics server deployment without version

Adding fact is_atomic in bootstrap-centos.yml.

Fix issue: #3538

* Add support for running a nodelocal dns cache

After encountering dns issues in a cluster I was recently working on I
noticed Kubernetes 1.13 introduced support for running a nodelocal dns
cache.

I believe this can usefull for more people.

https://github.com/kubernetes/kubernetes/commit/73b548db06c5e293533344c5b6171e955eac9ff1
https://github.com/kubernetes/enhancements/blob/master/keps/sig-network/0030-nodelocal-dns-cache.md

* Add requested changes

* Add additional requested changes + documentation

* Add requested changes after review

* Replace incorrect variable

Metrics port is exposed through a service for CoreDNS but not for kube-dns.

Setting host_architecture to allow etcd upgrade working through: ansible-playbook -b -i inventory/sample/hosts.ini cluster.yml --tags=etcd (on other case host_architecture is missing)

* Streamline path to certs dir

* More fixes

* Set path to etcd certs in kubernetes defaults instead

* Upgrade kubernetes to v1.13.0

* Remove all precense of scheduler.alpha.kubernetes.io/critical-pod in templates

* Fix cert dir

* Use kubespray v2.8 as baseline for gitlab

* Remove non-kubeadm deployment

* More cleanup

* More cleanup

* More cleanup

* More cleanup

* Fix gitlab

* Try stop gce first before absent to make the delete process work

* More cleanup

* Fix bug with checking if kubeadm has already run

* Fix bug with checking if kubeadm has already run

* More fixes

* Fix test

* fix

* Fix gitlab checkout untill kubespray 2.8 is on quay

* Fixed

* Add upgrade path from non-kubeadm to kubeadm. Revert ssl path

* Readd secret checking

* Do gitlab checks from v2.7.0 test upgrade path to 2.8.0

* fix typo

* Fix CI jobs to kubeadm again. Fix broken hyperkube path

* Fix gitlab

* Fix rotate tokens

* More fixes

* More fixes

* Fix tokens

Added a loop_control label to a few tasks that flood our logs.

* Fix basic auth tokens for kubeadm deployment.

* Tokens should be a dependancy on master, not nodes

* Remove variables defined in download role. Fixes #3799

* Cleanup some more variables

* Fix bad templating

* Minor fix

* Add dashboard to download role. Fixes #3736