After migrating a volume, if the original and new volumes are on
the same 3PAR backend, then the volume names are swapped. However,
if the original volume is not in the same 3PAR backend, the new
volume is renamed to the original volume's name.
Closes-Bug: 1858119
Change-Id: I1f9d4143d1ad2637a2173090b290f6f96b64c492