Implementation of a Libvirt volume driver for Veritas HyperScale.
The os-brick connector implementation is being reviewed here:
https://review.openstack.org/#/c/442754/
Depends-On: I94724ff04aed06b00e44085995cf2c0768e547e1
Change-Id: Iafb9ce4c1582715c6afac87cc9ae62e259f21b07
Implements: blueprint veritas-hyperscale-libvirt-volume-driver