Fixes Hyper-V basic scenario volume partition name

On Hyper-V volumes are attached to SCSI passthrough devices that have a
progressive naming (sdb, sdc etc) and cannot match the requested name
(e.g. vdb).

Closes-bug: #1357925
Co-Authored-By: Adrian Bora <abora@cloudbasesolutions.com>
DocImpact
Change-Id: I429b07d2ed55e7875034bc10510a039f6042c724
Merge "Fixes Hyper-V basic scenario volume partition name"