Steps to reproduce

1. Create a change

2. cherry pick that change to a different branch

3. Create another change on a different change and then depend on the change from step 2

Expected results

• I expect that the change should be tested.

Actual results

• It tests both the change that i cherry picked from and the cherry pick patch (i.e. the same change twice)

See https://gerrit.wikimedia.org/r/#/c/329698/ and https://gerrit.wikimedia.org/r/#/c/329770/ and https://gerrit.wikimedia.org/r/#/c/329771/1