restored change to demos
restored change to demos


Former-commit-id: 2cf8163bef7efc8d11538d34af89d5561083ab0e [formerly 2cf8163bef7efc8d11538d34af89d5561083ab0e [formerly 1238f1143c2b4d1722beff3ab86be98191852493]]
Former-commit-id: 83fb349a0c7f61950899abf58f6c4bb92411766d
Former-commit-id: 205a5d3432a9541bd6f0fb5558addf04c71ac466
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine