Fibrechannel and iSCSI for Violin Memory 6000 Series Arrays

This patch adds both Fibrechannel and iSCSI driver support for Violin
Memory 6000 Series All-Flash Arrays.

Certification results posted at:
https://bugs.launchpad.net/cinder/+bug/1399911

Change-Id: I9f62fe79e892cff01abdb02dbd95be8e432f8ab7
Implements: blueprint violinmemory-v6000-storage-drivers
Merge "Fibrechannel and iSCSI for Violin Memory 6000 Series Arrays"