tree 62fede5dcea501d314408d21da036dcdf281cfa3
parent 7734b882fad81ef496db149f423fa424135c6b64
author Antonio Barone <syntonyze@gmail.com> 1637167578 +0100
committer Antonio Barone <syntonyze@gmail.com> 1637167820 +0100

Adapt to the removal of cache diff

The "diff" cache has been removed in stable-3.5 (I52738c85), in favour
of two new caches, the git_file_diff cache (introduced in  Ia278881c0f)
and the gerrit_file_diff cache (introduced in I23f616d1).

Adapt the migration servlet accordingly and adjust the tests
expectations.

Bug: Issue 15287
Change-Id: I7610f2e580fac9fe25024aeee4e02f66da33c430