Migrate volume while attached to an instance

Test scenario with a bootable volume that is migrated via:
retype --on-demand <volume_id>
This will exercise cinder retype and migration as well as
nova swap_volume for a bootable volume.

Requires at least 2 Cinder backends which are configured in
devstack with:
CINDER_ENABLED_BACKENDS=lvm:lvmdriver-1,lvm:lvmdriver-2

Co-Authored-By: Erlon R. Cruz <erlon.cruz@fit-tecnologia.org.br>
Change-Id: I4ed9b1f30d4e4e595c44a0ce243c2463069833d7
3 files changed