restoring a version of a file does not recalculate the checksum

[individual-it]

1. setup files_primary_s3 with ceph
2. create a file called file0.txt with the content version 0
3. check the current checksum of the file via PROPFIND:

   curl -u admin:admin -X PROPFIND  http://localhost/owncloud-core/remote.php/dav/files/admin/file0.txt -d     '<?xml version="1.0"?> <d:propfind  xmlns:d="DAV:" xmlns:oc="http://owncloud.org/ns"><d:prop><oc:checksums /></d:prop></d:propfind>' | xmllint --format -
   

   result: SHA1:3d05de25721cdcadb8ff34a189e86e7a9af54c9c MD5:ed21253e3b26384985bc2f9af99c1c99 ADLER32:12aa0357
4. update the file so the content is now: version 0, version 1
5. check the current checksum of the file via PROPFIND
   result: SHA1:abab62244dfd0a8bf50a034781287cd725b9de4e MD5:71df209f63b657fb49a311331268abc4 ADLER32:4d2d06fa
6. restore the first version of the file, and check the checksum via PROPFIND
   result: SHA1:abab62244dfd0a8bf50a034781287cd725b9de4e MD5:71df209f63b657fb49a311331268abc4 ADLER32:4d2d06fa
   the checksum was not updated

possible related to #128

[ownclouders]

GitMate.io thinks the contributor most likely able to help you is @ownclouders.

Possibly related issues are #53 (Restoring a previous version of a shared file fails), #67 (Thumbnail preview of last version of a file does not work with scality), #155 (occ versions:cleanup does not work with S3), #128 (files are uploaded to ceph even when wrong checksum given), and #66 (Initializing a new user leads to an empty version created of the skeleton file).

[individual-it]

• unskip tests. acceptance tests were skipped in skip version checksum test on S3 core#33627 and [stable10] skip version checksum test on S3 core#33628

[individual-it]

same issue with scality