Use new objectdeletion package for deleting pointers.
In the best case scenario, it will make on database call to fetch
information about the number of segments. And another request to delete
and fetch information about other segments.
This PR also changes our object deletion API to return no error when an
object is not found but instead consider such operation as success. This
behavior is asligned with S3 API and makes the code less complex.
Change-Id: I280c56e8b5d815a8c4dafe8227689467e899775a
Improve our delete logic to require fewer database requests.
This PR creates a new objectdeletion package
Change-Id: I0500173bb9b8c771accb350f076329ede6dbb42c
