Restored SitesContext._slots_
Restored SitesContext._slots_


Former-commit-id: 47149fa32fe368aecc4a7c2b78efb4abf231bca6 [formerly 47149fa32fe368aecc4a7c2b78efb4abf231bca6 [formerly 00f1bb53ce5464ee16dcb1b23b7fa821c95e3266]]
Former-commit-id: 00504dde2d14238efbd909bce5a378aee04d5c25
Former-commit-id: fdf00f176f563c8e843f5f8fab08d518d4a00523
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine