Adds common clean script for CI infrastructure

Universal clean script will remove VirtualBox or libvirt/KVM VMs and
related hypervisor packages/kernel modules.  The script is meant to be
executed prior to a deploy to clean the jumphost. The script will also
power off baremtal nodes via IPMI.  These nodes are defined in yaml
and passed via argument -base_config.

JIRA: OCTO-109

Change-Id: I933b3d505b290d65996d60bf465144d92d433315
Signed-off-by: Tim Rozet <trozet@redhat.com>