
This patch adds update support to the Volume Type Encryption API Extension. It allows the updating of volume type encryption for a given volume type as long as no volumes are currently in use with that volume type. Change-Id: If5f9ef792626e7dfaf82365bb6838b964f8238ae Implements: blueprint encrypt-cinder-volumes https://blueprints.launchpad.net/nova/+spec/encrypt-cinder-volumes