This update for python-billiard fixes the following issues:
Update to v220.127.116.11 (boo#1136100)
+ Add support of sending parent process death signal.
+ Previous fix for handling timeouts caused a problem in warm shutdowns due to use of deepcopy.
We now use a shallow copy of the cache and do so only when it is needed.
This update was imported from the openSUSE:Leap:15.0:Update update project.