Made the multiPointSource index unique
Made the multiPointSource index unique


Former-commit-id: 1b80f7053a7a9082643cafd9773105030f0bbf9a [formerly 7c345a5de13ad50c419b9980c6fb07b1ded9a0e3]
Former-commit-id: 0d0b8be88a8b38610c2eb9ec76b37551a6a961cf
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine