After restoring a version of a file, webdav doesn't give the full correct content.

[dpakach]

Steps to reproduce

1. setup files_primary_s3 with ceph
2. create a file called file0.txt with the content Awesome new file.
3. update the file so the content is now: File.
4. restore the first version of the file
5. get the content of the file using webdav

curl -u tu1:tu1 -X GET 'http://core/remote.php/dav/files/tu1/file0.txt'

Exected result

You get the original content of the file Awesome new file

Actual Result

You only get the part of the file Aweso

possible related to #156, The file metadata seems to be not updating while changing the file version.
The request only returns the file as it sends request with Contnent-Length set to the old length of the file.

[phil-davis]

i.e. you get the start of the content of the restored file, but only up to the (shorter) length of the previously-current version.

[phil-davis]

Test scenario to cover this is added in core owncloud/core#36490
When fixing this bug, remove the @skipOnStorage:ceph @files_primary_s3-issue-278 tags, and make the scenario pass with S3 storage.

[individual-it]

same issue with scality