Fixed the _slots_ bug with RuptureCollectionSource
Fixed the _slots_ bug with RuptureCollectionSource


Former-commit-id: 27bb0eb90e85fad170255f0eba1dc0a3a73d5bb5 [formerly b908e38c81b3254a891d9cc6a79449dedff81615]
Former-commit-id: 85406082e0f2d84fea233e2306c41457ecded950
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine