This patchset implements the purge script as specified in its
related blueprint:
- The '--age-in-days' option allows to specify the number of
days before expiry
- The '--max-number' option allows us to specify a limit on the number
of objects to delete
- The '--audit-template' option allows you to only delete objects
related to the specified audit template UUID or name
- The '--dry-run' option to go through the purge procedure without
actually deleting anything
- The '--exclude-orphans' option which allows you to exclude from the
purge any object that does not have a parent (i.e. and audit without
a related audit template)
A prompt has been added to also propose to narrow down the number of
deletions to be below the specified limit.
Change-Id: I3ce83ab95277c109df67a6b5b920a878f6e59d3f
Implements: blueprint db-purge-engine
a6508a0013