1.5 kubelet fails to start when using unknown params

- Renaming templates for netchecker
- Add dnsPolicy: ClusterFirstWithHostNet to kube-proxy

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

In kubernetes 1.6 ClusterFirstWithHostNet was added as an option. In
accordance to it kubelet will generate resolv.conf based on own
resolv.conf. However, this doesn't create 'options', thus the proper
solution requires some investigation.

This patch sets the same resolv.conf for kubelet as host

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

Necessary to persist this directory for host-local IPAM used by Canal
Add pre-upgrade task to copy /var/lib/cni out of old kubelet.

Fixes #1190

Folded style in multiline 'when' condition causes error with
unexpected ident. Changing it to literal style should fix
the issue.

Closes #1190

Canal runs more pods and upgrades need a bit of extra
room to load new pods in and get the old ones out.

Graceful upgrades require 3 nodes
Drain now has a command timeout of 40s

- Run docker run from script rather than directly from systemd target
- Refactoring styling/templates

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

Latest released version of kube-policy-controller
contains important bug fixes and should be used
by default.

Non-brekable space is 0xc2 0xa0 byte sequence in UTF-8.

To find one:

    $ git grep -I -P '\xc2\xa0'

To replace with regular space:

    $ git grep -l -I -P '\xc2\xa0' | xargs sed -i 's/\xc2\xa0/ /g'

This commit doesn't include changes that will overlap with commit f1c59a91.

Allows config changes made by Ansible to restart dnsmasq deployment

The docker-network environment file masks the new values
put into /etc/systemd/system/docker.service.d/flannel-options.conf
to renumber the docker0 to work correctly with flannel.

Also changed unnecessary delay to a max timeout (now defaulting to 1s sleep
between tries)

Also rename play_hosts to ansible_play_hosts

etcd is crucial part of kubernetes cluster. Ansible restarts etcd on
reconfiguration. Backup helps operator to restore cluster manually in
case of any issues.

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

Reduce retry delay checking weave
Always load br_netfilter module

By default Calico CNI does not create any network access policies
or profiles if 'policy' is enabled in CNI config. And without any
policies/profiles network access to/from PODs is blocked.

K8s related policies are created by calico-policy-controller in
such case. So we need to start it as soon as possible, before any
real workloads.

This patch also fixes kube-api port in calico-policy-controller
yaml template.

Closes #1132

Fixes bug in CentOS/RHEL in felix related to overlayfs driver.