Check the specified configuration file exists.
Check the specified configuration file exists.


Former-commit-id: 33ddd4bf20f70a913426d4c0240dc2fc3791764b [formerly d692b53e4b9366c75d139ed7c117249319727b51]
Former-commit-id: ca80e7e0d59853da426b311bd50d71a29c7098bf
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine