gekkofwd integration tests fail

While MR !143 (merged) fixes the interception bug library for the forwarding mode (see #249 (closed)), using the correct library for the tests has now uncovered a different bug. The log below shows the problem.

Job #31607 failed for b9a21350:

@jean.bez Could you look into this? In the meantime I'm disabling the integration tests for gekkofwd until this is fixed.