Restored filter_sources
Restored filter_sources


Former-commit-id: 607c91c5d11fbd1e95d11aee36c7a44098f81f7e [formerly 4960d2881781219f60333b2daff12e41a2b3aaaa]
Former-commit-id: 04634e1ad27fe0b7c4a3083d182134bfd76161a8
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine