Fixed date in docstring explaining usage

Test Plan: Changed comment, fingers crossed :)
Fixed date in docstring explaining usage

Summary: Changed sub_process_time_out to 3 hours

Test Plan:
Changed comment, fingers crossed :)

Added a digit, fingers crossed :)

Reviewers: jace, mattfaus

Differential Revision: http://phabricator.khanacademy.org/D2871
Accidentally deleted monitor_lag value earlier by accident

Test Plan: Fixed blatantly wrong bug, fingers crossed :)