Switch packager.sh to pytest [skip ci]
Switch packager.sh to pytest [skip ci]


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Former-commit-id: 3c74f2b4e12c532eb42232324bb80f5e75094521
Former-commit-id: f95c10409bb97061bb07b757d9047e2d151d4cdc
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine