model: Add Sha1 alias

Related to T645

Test Plan

tox

---

Migrated from D3738 (view on Phabricator)

Some references in the commit message have been migrated:

• T645 is now swh/meta#645

Build is green

Patch application report for D3738 (id=13148)

Rebasing onto 09dcc04a...

Current branch diff-target is up to date.

Changes applied before test

commit b1a16b168b5803eb855ddafb1b4a6d8cc2ca3bde
Author: Antoine R. Dumont (@ardumont) <ardumont@softwareheritage.org>
Date:   Fri Aug 7 09:46:40 2020 +0200

    model: Add Sha1 alias
    
    Related to [T645](https://forge.softwareheritage.org/T645 'view original for T645 on Phabricator')

See https://jenkins.softwareheritage.org/job/DMOD/job/tests-on-diff/130/ for more details.

Merge request was accepted

approved this merge request

Merge request was merged

closed