Added oq.get_composite_source_model
Added oq.get_composite_source_model


Former-commit-id: 766de92f7ad68e954377125d58dee70fbb27f940 [formerly 766de92f7ad68e954377125d58dee70fbb27f940 [formerly b64706b7e1c1aafa62954f44cc93d2103276dc02]]
Former-commit-id: 7421725520d3233be07a90d1c6bf428ba852b8ee
Former-commit-id: ccfbabc9d252d9f3e1fa5a77667766c80c336b68
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine