Adds tests for Hyper-V Volume utils

Adds unit tests for Hyper-V BaseVolumeUtils,
VolumeUtils and VolumeUtilsV2 classes.

Co-Authored-By: Mouhammad-Nashwan Azhari <nmouhammad@cloudbasesolutions.com>

Partial-Bug: #1220256

Change-Id: I2792e0c08d2602f3c2690d44b632c2e932a94115
Fix class name for ServerGroupAffinityFilter

The class name for ServerGroupAffinityFilter is
ServerGroupAffinityFilter and not ServerGroupAntiAffinityFilter. The
wrong class lead to a wrong display on
http://docs.openstack.org/developer/nova/devref/filter_scheduler.html

Change-Id: I690a60cb70eab4837544ddd0bff6f1264e639592
Closes-Bug: #1360375
Merge "Adds tests for Hyper-V Volume utils"
Merge "Fix class name for ServerGroupAffinityFilter"