Update dirty fix for multiprocessing with default 'spawn' method.
Update dirty fix for multiprocessing with default 'spawn' method.

sfepy/sfepy,rc/sfepy,vlukes/sfepy,vlukes/sfepy,BubuLK/sfepy,rc/sfepy,rc/sfepy,sfepy/sfepy,sfepy/sfepy,vlukes/sfepy,BubuLK/sfepy,BubuLK/sfepy