Add a random chance to ignore a job to reduce contention
This should probably be solved better (perhaps with a binary
exponential backoff).
Patch by: Sverre Rabbelier
README.txt
coverage.py
setup.py
coverage.egg-info/SOURCES.txt
coverage.egg-info/dependency_links.txt
coverage.egg-info/entry_points.txt
coverage.egg-info/top_level.txt