Allow deprecated volume update keys in v2

Keys like display_name and display_description were deprecated for other
actions in v2 like creating volumes, so for consistency they should work
with updating.

DocImpact
Closes-Bug: #1301172
Change-Id: I19bc7c85352578bb57fa9fdaf1817f78e0ee2f2a
Merge "Allow deprecated volume update keys in v2"