initial uhs updates to db schema
initial uhs updates to db schema


Former-commit-id: efd84ea1505b158415e166d1077a759f376fc218 [formerly 929f92bfb28d185f15e864c021fdc620acd127d4]
Former-commit-id: b8b2e57d8bd6041303a3a7ad89a0f1bd3c7cfb3d
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine