The changes from 3aa3155 as part of SERVER-30642 were ineffective at increasing the election timeout for the concurrency_sharded_with_stepdowns*.yml test suites because the JavaScript version of the stepdown thread reconfigures the replica set and sets a 5 second election timeout by default. We should additionally additional set electionTimeoutMS=1 day as part of the stepdown options specified to the ContinuousStepdown.configure() function.

Note: This is no longer an issue for the 4.0 or master branches because they've switched to using the Python version of the stepdown thread, which doesn't reconfigure the replica set.