Munge Errors submitting job on SGE gridengine Galaxy 18.09

[jennaj]

Iinked post

drmaa library threads and munge: Invalid Credential Format

So this is interesting and going a bit further than https://github.com/pygridtools/drmaa-python/issues/44, as this is failing also with just a single thread. Maybe we can come up with a patch for drmaa-python, which would probably be the best solution. Can you check that this works with a ProcessPool instead of a ThreadPool ?