This module introduces the ability to set image metadata
which is distinct from regualt volume metadata, and is
required for correct boot-from-volume behaviour.
This allows workflows such as replication and disaster
recovery to correctly preserve image provenance and
Nova boot semantics.
Change-Id: I55732fbe8fc6bd579b8542f834033650a076db76
Signed-off-by: Simon Dodsley <simon@purestorage.com>
