fix broken kvs purge tests, avoid hard-coded site hashes
fix broken kvs purge tests, avoid hard-coded site hashes


Former-commit-id: 18d1c95695f28234ea9e230a3431330fbb0d3f0a [formerly 18d1c95695f28234ea9e230a3431330fbb0d3f0a [formerly c287a40f1420a73a04eab2d8a53daefae5748a04]]
Former-commit-id: 7ad56a1f41dfb25f615660f35fcae6ab9f10bb90
Former-commit-id: e8c8f4c494e853e0921090c59a945d9281f3fea1
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine