Ingest Google Code Mercurial repositories

We have retrieved the hg repositories and not yet ingested them. This task is about the actual ingestion using our loader-mercurial (#329 (closed)).

(Equivalent task as the git repositories T673 and svn ones swh-loader-svn#617 (closed))

Note:

• As in swh-loader-svn#617 (closed), the origin date to use for injection is 'Tue, 3 May 2016 17:16:32 +0200'. We retrieved all googlecode repositories together (git, svn, hg).

• Index of current retrieved mercurial repositories is at uffizi:/srv/storage/space/mirrors/code.google.com/sources/INDEX-hg

Format: <origin_url>

• urls recreated with https://.googlecode.com/hg/ scheme (it's actually stored in the previously mentioned index file).

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Migrated from T682 (view on Phabricator)