Added a forgotten import
Added a forgotten import


Former-commit-id: 904d01ae7e4ec9613f2a6c849c7c5593cd97a657 [formerly 520bd73c59527d84bc771676870d4e4c3e0c6532]
Former-commit-id: 9759a3314b65bca8ddbdaad4e2792c80b2881b7e
gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine,gem/oq-engine