Cleaned up exit codes.
Cleaned up exit codes.


Former-commit-id: b5970ce45ce7bb7449be35484dec6011c2c3d15c [formerly 25e8ebc905dec4b6cf9567a63ebdb1e32a9e98bf] [formerly 25e8ebc905dec4b6cf9567a63ebdb1e32a9e98bf [formerly eaf85151e6c09d4496fd98ed6e16125ed831c538]]
Former-commit-id: d41aed8face5c782b7e31de55929413c707c0bed
Former-commit-id: f2c5eeea8d17dbb240a1fc51ac70210cd1034ec0
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine