Add molecule tests for passing version

This test the case when user pass a version in instead of relying on
the role to pick the default, which is the latest.

Change-Id: If6cc60c556b27f1ad5f28c1597578753ad676391
Signed-off-by: Jeremy Phelps <jphelps@linuxfoundation.org>

Allow version to be set by end user

In the case that the version is not set, then the role will simply
install the latest available from the docker repos.

Change-Id: I31d84ac1eb8e40c829247dc194d24197dc019508
Signed-off-by: Jeremy Phelps <jphelps@linuxfoundation.org>

Parameterize arch with ansible_architecture

Note that docker uses armhf instead of aarch64.

Change-Id: I70c1734f9435f44dda3a314141ac0c1675b2a544
Signed-off-by: Jeremy Phelps <jphelps@linuxfoundation.org>

Add molecule testing for CentOS machines

Add the systemd workaround for CentOS systems so that we can
enable molecule testing.

Change-Id: I3cdeb4b386f8c2ea4183be0423fd7b5daf3ebda2
Signed-off-by: Thanh Ha <thanh.ha@linuxfoundation.org>

Use docker instead of docker-py for molecule

`docker` has replaced `docker-py` as the python library for talking to
the Docker api.

Change-Id: Ia215ba0a8e681cf0c5a5b09048267dd58ce741d6
Signed-off-by: Trevor Bramwell <tbramwell@linuxfoundation.org>

Migrate lf-ansible docker-install role

Move in docker-install role from lf-ansible.

Change-Id: I68328c65be64855d8c49b463a215c60116269f2d
Signed-off-by: Thanh Ha <thanh.ha@linuxfoundation.org>

Bootstrap docker-install role

Initial docker-install role. Currently does nothing and only contains
metadata information.

Change-Id: Id0191ebd0b2aae5b2d15aca749d2bdfa7a810592
Signed-off-by: Thanh Ha <thanh.ha@linuxfoundation.org>

Initial empty repository