Put information (client, collection and deposit-id) inside metadata for metadata-only deposit

With the complete deposit, a revision is created with a commit message including the client, deposit number and collection. These items will be lost with a metadata-only deposit in the ERMDS, since the revision or other elements aren't created in the archive.

To solve this discrepancy, deposit message should be added in the xml. Here a proposal to add inside the swh:deposit:

<swh:receipt>
   <swh:client>HAL</swh:client>
   <swh:collection>HAL</swh:collection>
   <swh:number>160</swh:number>
   <swh:date>reception date</swh:date>
</swh:receipt>

reception date is equivalent to today's commit date This information might be redundant with a property already used for ERMDS entries (if so, it can be deleted).

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Migrated from T2779 (view on Phabricator)