lofreq call-parallel will hang forever on subprocess error

[tfmorris]

If one of the subprocesses errors (e.g. gets killed by the OOM killer), the parent process will hang forever because there's no timeout on the pool.join() here:

lofreq/src/scripts/lofreq2_call_pparallel.py

Line 662 in 007a8ba

pool.join()# wait until all done

I suggest adding a timeout, even a very large one, to the join.