bugfix. scenario calculator self.exposure_model -> self.rc.exposure_model
bugfix. scenario calculator self.exposure_model -> self.rc.exposure_model


Former-commit-id: a9840d226cb8c7725de3a930444849124c682082 [formerly 839249aa55f4117ab4f23cd02f08ad1b417557a0]
Former-commit-id: f3332909875030505d26e14e8df1c59d95751c90
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine