Compute HA: Remove workaround for Newton and older
Compute HA: Remove workaround for Newton and older

This change removes workaround in check-run-nova-compute script which
was implemented for ancient versions.

Change-Id: I9250953a179ba9a81b0289bc5e1239c4e0e54784

openstack/tripleo-heat-templates,openstack/tripleo-heat-templates