WebDAV MOVE with body returns 400 rather than 415

[phil-davis]

This was fixed in the edge branch, but still fails in the master branch. https://drone.cernbox.cern.ch/cs3org/reva/8201/10/6

 Scenario: send MOVE requests to webDav endpoints with body as normal user                                  # /drone/src/tmp/testrunner/tests/acceptance/features/apiAuthWebDav/webDavMOVEAuth.feature:163
    When user "Alice" requests these endpoints with "MOVE" including body "doesnotmatter" about user "Alice" # OCSContext::userSendsRequestToTheseEndpointsWithBody()
      | endpoint                                           |
      | /remote.php/webdav/textfile0.txt                   |
      | /remote.php/dav/files/%username%/textfile0.txt     |
      | /remote.php/webdav/PARENT                          |
      | /remote.php/dav/files/%username%/PARENT            |
      | /remote.php/webdav/PARENT/parent.txt               |
      | /remote.php/dav/files/%username%/PARENT/parent.txt |
    Then the HTTP status code of responses on all endpoints should be "415"                                  # FeatureContext::theHTTPStatusCodeOfResponsesOnAllEndpointsShouldBe()
      Responses did not return expected http status code
      Failed asserting that 400 is identical to 415.

expected-failures in reva master will link to this issue.

The fix from edge could be backported to reva master, if someone wants to do it.