LVM: Pass volume size in MiB to copy_volume() during volume migration
Currently migrate_volume() in lvm.py does not pass volume size in
MiB but passes volume size in GiB to copy_volume(). The size argument
of copy_volume() requires MiB value. As a result, if the volume size
is 1GiB, copy_volume() copies only 1MiB head of 1GiB volume to the
destination volume, and then the volume data is corrupted.
This patch fixes to pass volume size in MiB.
Closes-bug: #
1454835
Change-Id: I8e06195dc3625ef07bc9858d844541e37a231b73