Refactored the GmfGetter
Refactored the GmfGetter


Former-commit-id: 13df90900593996562544ea46986c5703e2505d5 [formerly 4ce8abb08222c69a37066ae9efae636f0b347bec]
Former-commit-id: 163dabc13c6f11f4318adf3fc289524f0c6adea8
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine