use min of the maximum losses
use min of the maximum losses


Former-commit-id: 2c5f1907d63ddeff724469a620daab13d56dc8b0 [formerly 2ca6938bfb3e023a5706836b384fab11f99de191]
Former-commit-id: f2911f310683096480a16e2828a98c432d3dec47
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine