Fix FB-specific instant tests script
Fix FB-specific instant tests script

Summary: Fix FB-specific instant tests script

Reviewed By: vkhalidov

Differential Revision: D20629213

fbshipit-source-id: 271ef6c944407523f699d1364f426afd1cebd513

facebookresearch/detectron2,facebookresearch/detectron2,facebookresearch/detectron2