Improve the oq-engine wrapper and add deprecation warning
Improve the oq-engine wrapper and add deprecation warning


Former-commit-id: 4a777a6db627e916b9132701cf1d62ac40dc6e91 [formerly 01c61d0ea9eacb99a9f683fdc576f4427fdcc27f]
Former-commit-id: cce789a63bf886836b4f76fabfde5136aee0d248
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine