* Remove old docker packages

This removes docker packages that are obsolete if docker-ce packages are to be installed, which fixes some package conflict issues that can occur during upgrades.

* Add support for setting obsoletes=0 when installing docker with yum

Support docker-ce and docker-engine include redhat/centos ubuntu debian

* Use docker-ce 17.03.2
* Docker-engine may be discarded

Update default docker version to 17.03.1

* Adding yaml linter to ci check

* Minor linting fixes from yamllint

* Changing CI to install python pkgs from requirements.txt

- adding in a secondary requirements.txt for tests
- moving yamllint to tests requirements

- Only have ubuntu to test on
  - fedora and redhat are placeholders/guesses
  - the "old" package repositories seem to have the "new" CE version which is `1.13.1` based
- `docker-ce` looks like it is named as a backported `docker-engine` package in some
  places

- Did not change the `defaults` version anywhere, so should work as before
- Did not point to new package repositories, as existing ones have the new packages.

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

This allows Ubuntu/Debian to downgrade Docker version if
a newer version is installed, instead of failing.

install docker on a largest number of linux distribution (based on https://github.com/marklee77/ansible-role-docker)