calcs/hazard/classical/core:
calcs/hazard/classical/core:

Classical calculator now uses the cached SiteCollection in tasks, instead
recomputing it every time.


Former-commit-id: 803dbb39120113d1e2db6dea53a7e7f9a555486f [formerly c2f58e64a204a24d892b9e0ad0ac426d278e7a99]
Former-commit-id: b321518e6aab0b7af34adb43940895c72cc9a32a
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine