Disable vault role properly on ansible 2.2.0

Remove standalone etcd specific play, cleanup host mode

when condition does not seem to work correctly at playbook
level for ansible 2.2.0.

Now etcd role can optionally disable etcd cluster setup for faster
deployment when it is combined with etcd role.

Use find module for checking for certificates

Added Missing AWS IAM Profiles and Policies

The AWS IAM profiles and policies required to run Kargo on AWS
are no longer hosted in the kubernetes main repo since kube-up got
deprecated. Hence we have to move the files into the kargo repository.

Also generate certs only when absent on master (rather than
when absent on target node)

Add support for atomic host

Possibility to add Loadbalancers without static IP (e.g. AWS ELB) #1074

fix inline verbatim blocks formatting in markdown

Allow to specify etcd backend for kube-api

Add autoscalers for dnsmasq and kubedns

By default kubedns and dnsmasq scale when installed.
Dnsmasq is no longer a daemonset. It is now a deployment.
Kubedns is no longer a replicationcluster. It is now a deployment.
Minimum replicas is two (to enable rolling updates).

Reduced memory erquirements for dnsmasq and kubedns

Until now it was not possible to add an API Loadbalancer
without an static IP Address. But certain Loadbalancers
like AWS Elastic Loadbalanacer dontt have an fixed IP address.
With this commit it is possible to add these kind of Loadbalancers
to the Kargo deployment.

Add upgrade-cluster and reset playbooks to syntax check

Added host_vars to gitignore

Use docker-engine 1.13.1

The default version of Docker was switched to 1.13 in #1059.  This
change also bumped ubuntu from installing docker-engine 1.13.0 to
1.13.1.  This PR updates os families which had 1.13 defined, but
were using 1.13.0.

The impetus for this change is an issue running tiller 1.2.3 on
docker 1.13.0.  See discussion [1][2].

[1] https://github.com/kubernetes/helm/issues/1838
[2] https://github.com/kubernetes-incubator/kargo/pull/1100

Since inventory ships with kargo, the ability to change functionality
without having a dirty git index is nice.  An example, we wish to change
is the version of docker deployed to our CentOS systems.  Due to an issue
with tiller and docker 1.13, we wish to deploy docker 1.12.  Since this
change does not belong in Kargo, we wish to locally override the docker
version, until the issue is sorted.

Restart kube-controller for host_resolvconf mode

Updates based on feedback

Simplify checks for file exists

remove invalid char

Review feedback. Use regular systemd file.

Add template for docker systemd atomic

Fixed counter in ETCD Openssl.conf

Allow connections from pods to local endpoints

Fix vault role in upgrade-cluster.yml

By default Calico blocks traffic from endpoints
to the host itself by using an iptables DROP
action. It could lead to a situation when service
has one alive endpoint, but pods which run on
the same node can not access it. Changed the action
to RETURN.

Ensure vagrant uses flannel

The Vagrantfile is setup to use flannel.  The default network
was changed to Calico (#1031).  However, the Vagrantfile was
not updated to reflect this.  Ensuring the Vagrantfile remains
functional on master, until someone decides to make it work
with Calico.

Adding KUBELET_CLOUDPROVIDER to kubelet.rkt.service

Remove upgrade from the ubuntu-rkt-sep CI job

Change kube-api default port from 443 to 6443

Kubernetes project is about to set etcdv3 as default storage engine in
1.6. This patch allows to specify particular backend for
kube-apiserver. User may force the option to etcdv3 for new environment.
At the same time if the environment uses v2 it will continue uses it
until user decides to upgrade to v3.

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

Operator can specify any port for kube-api (6443 default) This helps in
case where some pods such as Ingress require 443 exclusively.

Closes: 820
Signed-off-by: Sergii Golovatiuk <sgolovatiuk@mirantis.com>