Disable idempotency for ubuntu-weave-sep

Weave kube

CI is failing 40% of the time due to errors in reset.
Let's disable idempotency check per-patch until we fix it.

Fixes #953

Bugfix: skip cloud_config on etcd

Fixing lint check for ci

Consolidating kube.py module

Update coreos-stable image

Our old coreos-stable image has docker 1.10

Switch to ansible_hostname in calico

For consistancy with kubernetes services we should use the same
hostname for nodes, which is 'ansible_hostname'.

Also fixing missed 'kube-node' in templates, Calico is installed
on 'k8s-cluster' roles, not only 'kube-node'.

add skippy stdout callback

Splitting out moderator check from syntax check

- Attempt to clarify CI runs from contributors

Update the group_vars for Terraform

also use kube_api_pwd for root account

Fix calico-rr peering with k8s masters

Pin docker version on RedHat and CentOS to the desired version

Specify the version of the credentials to download from Horizon

That way, it will not become stale.

Related bug #929

More recent versions of OpenStack Horizon provide Identity v2 and
Identity v3 versions of the RC file.

This makes it a bit more secure. Also the password can now be changed with a (inventory) variable (no need to edit all.yml).

It removes the teal lines when a host is skipped for a task. This makes the output less spammy and much easier to read. Empty TASK blocks are still included in the output, but that's ok.

Calico-rr is broken for deployments with separate k8s-master and
k8s-node roles. In order to fix it we should peer k8s-cluster
nodes with calico-rr, not just k8s-node. The same for peering
with routers.

Closes #925

Sorting ansible args, fixed ci cluster_mode

Add scale thresholds to split etcd and k8s-masters

Genericize test cases and namespace create pod

Add tasks to ensure that the first nodes have their directories for cert gen

Add nginx local balancer port configuration variable

Ansible apps should only check for api-server running on the master.

Fix setting resolvconf when using rkt deploy mode

Update Ansible to 2.2.1

Add docker 1.13, update 1.12 to 1.12.6

Allow to specify number of concurrent DNS queries

Also adds calico-rr group if there are standalone etcd nodes.
Now if there are 50 or more nodes, 3 etcd nodes will be standalone.
If there are 200 or more nodes, 2 kube-masters will be standalone.
If thresholds are exceeded, kube-node group cannot add nodes that
belong to etcd or kube-master groups (according to above statements).

Fixes #903