* Added ppc64le support

* Fixed linting errors

The tf-elastx_cleanup test job was failed with error message:

Port xxxxxxxx-xxxx-xxxx-xxxx-xxxxxxxxxxxx cannot be deleted
directly via the port API: has device owner network:router_interface.

That means necessary to remove a subnet from the router before
deleting the port.
This adds a method to removes a subnet from the router automatically.

The main functions are wrapped by a sys.exit function which expects and
argument. The curent implementation isn't returning values in all cases.
This change ensures main functions return a value in all cases.

* Ansible: move to Ansible 3.4.0 which uses ansible-base 2.10.10

* Docs: add a note about ansible upgrade post 2.9.x

* CI: ensure ansible is removed before ansible 3.x is installed to avoid pip failures

* Ansible: use newer ansible-lint

* Fix ansible-lint 5.0.11 found issues

* syntax issues
* risky-file-permissions
* var-naming
* role-name
* molecule tests

* Mitogen: use 0.3.0rc1 which adds support for ansible 2.10+

* Pin ansible-base to 2.10.11 to get package fix on RHEL8

This will avoid SSH connection on the local host

- Directly update the main.yml file with the new hashes.

- make it follow redirects
- error out if an HTTP error is encountered

Change-Id: I4498d1c0585ee98c23856208d660caadf67cab34

* Let Premoderator script add labels

* Fix JQ error

* Minor fixes

* Debug patch label output

* Try again

* Try again

* Try again

* Try again

* Try again

* Minor cleanup

Broken since 4efb0b78

* Update premoderator to fix Github API throttle

* Update premoderator script

Add exit codes and document the exit code.

* Fix indentation

Run only commands that apply to the current deployed cluster (only get
calico info and skip weave/flannel when deploying calico, for example).

Add helm release info if helm is deployed

Currently Kubernetes version can be selected using "kube_version" variable.

- Attempt to clarify CI runs from contributors

Do not run unit-tests for master merges.
Fix the permissive "null" user.

Signed-off-by: Bogdan Dobrelya <bogdando@mail.ru>

For security and resources utilization reasons, do not auto-start CI
for opened/updated PRs.

A member of the kubernetes-incubator github org has first to approve
that the PR is reasonable to test by putting the "ci check this" into
the PR's comments.

If approved that way, the CI pipeline starts as always. Only the 1st step
of the pipeline is premoderatied, the rest will follow each over on
success.

Signed-off-by: Bogdan Dobrelya <bogdando@mail.ru>

* Add restart for weave service unit
* Reuse docker_bin_dir everythere
* Limit systemd managed docker containers by CPU/RAM. Do not configure native
  systemd limits due to the lack of consensus in the kernel community
  requires out-of-tree kernel patches.

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

Signed-off-by: Bogdan Dobrelya <bogdando@mail.ru>

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