Currently, having openshift_node and openshift_node_upgrade
as two distinct roles has created a duplication across
handlers, templates, and some tasks.

This commit combines the roles to reduce duplication
and bugs encountered by not putting code in both places.

Most of this role's purpose was to set facts.  The vast majority
of these facts were simply redefining user-supplied variables.

This commit also removes various artifacts leftover from
previous versions, as well as variables that seem to be
entirely unused.