Minor simplification of the hazard_getter query
Merge branch 'master' of github.com:gem/oq-engine into simplify_hazard_getter_query
Merged from master
Simplified the hazard getter query
Performed the filtering on the assets, not the GMFs
Added a comment on Scenario hazard getters
Improved profiling (calc time vs save time)
Merge pull request #1147 from gem/simplify_hazard_getter_query

Simplify hazard getter query