Currently, TestTimeout.execute_resmoke() (https://github.com/10gen/mongo/blob/01551ea99903eced520614deec851a07bd505a2e/buildscripts/tests/resmoke_end2end/test_resmoke.py#L152).) works as follows:

1. It starts resmoke async
2. It sleeps, to allow the test to start
3. It signals an interrupt to resmoke and triggers the hang analyzer

This is unreliable, because the sleep() operation can transiently fail. trevor.guidry@mongodb.com and I agreed that a better way is for the underlying test to signal to the test process that it is running and ready to be interrupted.