Changed the task distribution in ebrisk [skip hazardlib][demos]
Changed the task distribution in ebrisk [skip hazardlib][demos]


Former-commit-id: 3bedade97bdfcd8be8a5aa0bfff2489b86b731b7
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine