This commit corrects service names and adds
DOCKER_SERVICE variable to openshift_master
system container creation.

This will ensure services will restart correctly
and in the proper order.

Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1542324

Most of these checks are no longer applicable to
the tasks on which they are applied.

This commit removes incorrect ha checks to ensure
services are restarted at appropriate times.

Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1500897

There are some obsoletes in 3.9 packages which lead yum to upgrade
directly from 3.7 to 3.9 when you ask for 3.8 packages while 3.9 repos
are enabled. Since we'd like to allow people to run one playbook to
upgrade from 3.7 to 3.8 to 3.9 we need to exclude those packages when
upgrading to 3.8

Move more plugins to lib_utils

This commit continues moving plugins into lib_utils.

This commit does not move any plugins for add-on roles
such as logging and metrics.

This variable may or may not be defined by the users.

During deployments, it will be set to '-{{ openshift_version }}'
if undefined.

During upgrades, it will remain undefined.

This commit ensures that if the variable is undefined,
empty strings '' are set.

We set these variables using facts in init, no need
to duplicate the logic all around the codebase.