Automatic merge from submit-queue.

Cast openshift_docker_use_system_container to bool

openshift_docker_use_system_container might be passed
in via ini inventory as 'openshift_docker_use_system_container=false'

This condition will be interpreted as a string type, instead of
boolean.

Casting openshift_docker_use_system_container as bool
will achieve the users desired intent.

Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1528943

openshift_docker_use_system_container might be passed
in via ini inventory as 'openshift_docker_use_system_container=false'

This condition will be interpreted as a string type, instead of
boolean.

Casting openshift_docker_use_system_container as bool
will achieve the users desired intent.

Fixes: https://bugzilla.redhat.com/show_bug.cgi?id=1528943

This commit moves some deprecated variable logic
outside of openshift_facts and into role defaults.

Remove some small items from openshift_facts that
don't need to be there.

This commit combines these two sources of variables.

Prior to the current release, some plays external to
the openshift_master role consumed these variables
using relative imports.  This is no longer the case,
so we can safely combine the vars into defaults.

This simplifies some variable logic.

Simply dns_port variable by remove from openshift_facts.

Simplify the variable is_master_system_container

Simplify the logic for this variable.