edited usage function in packager script
edited usage function in packager script


Former-commit-id: 40984b4367b7a1a624b8561aaee9646d3e611154 [formerly 1e608099ff1160f6801680d6f5bbf23bb6e7bdfb]
Former-commit-id: d024e73f29d7f265871b287d033aa12e9b019cbb
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine