initial Config class implementation
initial Config class implementation


Former-commit-id: aafc396639318ec27eff9e070dc2df7fd1c307bb [formerly fb136c892d6d4e39fe70ecffb640a76f9d426afd]
Former-commit-id: 68f609acb03506df1c8040d9468412df85042113
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine