Using SiteCollection.from_points
Merge branch 'disagg-2' of github.com:gem/oq-engine into light-site-collection
Merge branch 'master' of github.com:gem/oq-engine into light-site-collection
Merge branch 'light-site-collection' of github.com:gem/oq-engine into light-site-collection
Made the _site_collection_cache into a WeakValueDictionary
Merge branch 'site-collection-cache' of github.com:gem/oq-engine into site-collection-cache