Avoid associating the site model when unnecessary [skip hazardlib]
Avoid associating the site model when unnecessary [skip hazardlib]


Former-commit-id: a0e0606605a409c0d733ad2ba72b547e3a0fe1f3
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine