Restore rtree in event based [skip hazardlib]
Restore rtree in event based [skip hazardlib]


Former-commit-id: 5d470df8ef8c83db8ab20ebac2ad2cefc390c33c [formerly 5d470df8ef8c83db8ab20ebac2ad2cefc390c33c [formerly d7197e7cf0de6173409d0f982bc0864545283d06]]
Former-commit-id: f2ddc4c9ee64dad1cd89fdcc8780ffaaa7946235
Former-commit-id: 447b4c596e8d635a2c81af49a16bc126b4bdbe43
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine