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
(cherry picked from commit d75a90ec1daff1444f20f6b68255890391bdb4e5)
Change iogrp property when retyping for Storwize/SVC

If need migration when retyping, Storwize/SVC driver will add a copy
of the volume first, and then start a task to check volume sync
progress which will run each 10 mins. At last delete the origin copy
when sync finished.

But iogrp property is not a parameter of addvdiskcopy, so the iogrp
of the copy volume is the same as the origin. If iogrp property is
diff between the old and new volume type, the property will not
change when retyped.

Change-Id: Ie4414bcf95fa6e61d7d618618f48837eef740da4
closed-bug: #1298247
(cherry picked from commit 5c336123d3252e7fc4e1aeabd853457ab05838be)
Merge "Allow deprecated volume update keys in v2" into milestone-proposed
Merge "Change iogrp property when retyping for Storwize/SVC" into milestone-proposed