This change adds vSCSI Fibre Channel volume support via cinder for the
PowerVM virt driver. Attach, detach, and extend are the supported
volume operations by the PowerVM vSCSI FC adapter. PowerVM CI volume
tests are run on-demand only which can be done by leaving a comment
with "powervm:volume-check".
Blueprint: powervm-vscsi
Change-Id: I632993abe70f9f98a032a35891b690db15ded6a0