Updated plot_agg_curve
Updated plot_agg_curve


Former-commit-id: 143fd473b55bb3bce979254d2f9849f48b9b61a0 [formerly 31c07255026d4795415f0f138e79636215e4cbae] [formerly 31c07255026d4795415f0f138e79636215e4cbae [formerly e41982ae414b1d1daea03941a2d237cd52ac76f6]]
Former-commit-id: f80ced6b694f301429f47ed83e511cfc1882191f
Former-commit-id: d37ad0eba41c402b2086a162740f24f3185bd51f
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine