Logs from JS tests are polluted with an assertion failure regarding the missing parameter waitForStepDownOnNonCommandShutdown. This parameter is expected to be missing before 4.1.10 and after 4.4 and it will be definetly dropped by SERVER-47797 once 4.6 it will became last-stable.

Until then we don't want this assertion to pollute our logs. Moreover many auto generated BFG suggest this assertion as a possible cause of the problem and obviously it is not. This makes the life of the build baron much more difficult.