GitLab

Summary:
In 9d238344, the test utils were moved to the core library, but the import for the create_fake_detection_data_loader inside the d2go_beginner.ipynb wasn't updated.

Pull Request resolved: https://github.com/facebookresearch/d2go/pull/29

Reviewed By: newstzpz

Differential Revision: D27239846

Pulled By: zhanghang1989

fbshipit-source-id: e39df32746b1d1081026f9969bda84e73ac7df55