- use ObjectMD model instead of raw parsed JSON object

- update the new microVersionId field before putting the metadata
  changes, to force MongoDB to apply the change and generate an event
  in the oplog

- side fix: call MetadataWrapper.close() so that the script exits
  after completion

(cherry picked from commit 9e97958)

Fix bug on updating metadata. Add 'DEBUG' option to output debug level
information.

(cherry picked from commit 99a8180)

(cherry picked from commit ac87ae2)

(cherry picked from commit 724008d)

The code used to re-create the replication state, which could break some
fields (esp. dataLocation) or remove some replication backends.

We now simply update the status, which is safer (more future-proof) and
simpler.

Issue: S3UTILS-77
(cherry picked from commit 9df7207)

This is especially needed in case the object was created before
replication is enabled on the bucket.

Issue: S3UTILS-76
(cherry picked from commit ab22723)

Update BackbeatClient with latest schema from BackbeatAPI 8.4 branch

Make sure the `PUT /_/backbeat/metadata` route gets the VersionId
attribute, so that it is not confused in thinking we are attempting to
update the master version.