Add dns_domain for each host to /etc/hosts

Fix wrong path for dhclient.conf on RedHat/CentOS

Manual steps for Gitlab CI pipeline

* Reduce default testcase to 2 nodes, add HA case.
* Adjust gen_matrix script for Travis/Gitlab CIs.
* Enable netchecker deploy foro gitlab CI.
* Sync other things from travis matrix and reorder them as build steps
  for pull requests, master branch, auto/manual.
* Do auto-step1 from part1 and manual step2,3 for branches/PRs.
* Do manual steps from part2, special for master merges.

Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>

Consider netcheck passed if agents can't report in time

Fix etcd member list when upgrading ETCD from an old version

Add deployment from gitlab-ci

Fixes #754

Double the time to wait for the netcheck agents.
Do not fail CI build, if agents can't report in time.

Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>

Set net.ipv4.ip_forward=1 on all systems, not only on GCE

/etc/dhclient.conf is ignored on RedHat/CentOS
Correct location is /etc/dhcp/dhclient.conf

Add calico/routereflector support

Rebalance CI GCE zones for better CPU per region usage

Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>

Add support for cloud-provider based networking

Enable netchecker for CI

Add BGP route reflectors support in order to optimize BGP topology
for deployments with Calico network plugin.

Also bump version of calico/ctl for some bug fixes.

* Enable netchecker app for CI postinstall tests
* Rework outputs and better coverage to the ping between pods post
intall test case. With netchecker deployed, the test covers hostnet
to hostnet and standard to standrad pods ping check as well.

Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>

Fix kube_version to include 'v' again

https://github.com/kubernetes-incubator/kargo/pull/736 missed this

Address standalone kubelet config case

Allow to let the cloud provider configure proper routing for nodes.

Move kube_version to group_vars/all to allow easier changing of version

Also allows to perform version dependent logic in Ansible roles.

Pass --anonymous-auth to apiserver for 1.5>=

Add Azure Resource Group templates and scripts to contrib

Fixes #732

Fix resolvconf

Also place in global vars and do not repeat the kube_*_config_dir
and kube_namespace vars for better code maintainability and UX.

Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>

Do not repeat options and nameservers in the dhclient hooks.
Do not prepend nameservers for dhclient but supersede and fail back
to the upstream_dns_resolvers then default_resolver. Fixes order of
nameservers placement, which is cluster DNS ip goes always first.

Signed-off-by: Bogdan Dobrelya <bdobrelia@mirantis.com>