Work in progress
Work in progress

I'm stopping here for a moment to create another independent branch to
better handle job parameter validation.


Former-commit-id: 025f77742203d202221453e36b0504f8bee146bf [formerly 27afad667c5a697395171aab1291ccc6cfee38b3]
Former-commit-id: b433792010b3f20eb4e4f43c28552a4030ea01b0
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine