Move back to use stable binaries 2.7. #4263

Job	Run time
pytorch_tutorial_build_worker (2, 15, linux.g5.4xlarge.nvidia.gpu)	10m 41s
pytorch_tutorial_build_worker (4, 15, linux.g5.4xlarge.nvidia.gpu)	10m 25s
pytorch_tutorial_build_worker (1, 15, linux.g5.12xlarge.nvidia.gpu)	11m 29s
pytorch_tutorial_build_worker (5, 15, linux.g5.4xlarge.nvidia.gpu)	9m 8s
pytorch_tutorial_build_worker (9, 15, linux.g5.4xlarge.nvidia.gpu)	9m 55s
pytorch_tutorial_build_worker (15, 15, linux.g5.4xlarge.nvidia.gpu)	9m 1s
pytorch_tutorial_build_worker (7, 15, linux.g5.4xlarge.nvidia.gpu)	9m 1s
pytorch_tutorial_build_worker (12, 15, linux.g5.4xlarge.nvidia.gpu)	9m 52s
pytorch_tutorial_build_worker (10, 15, linux.g5.4xlarge.nvidia.gpu)	9m 1s
pytorch_tutorial_build_worker (14, 15, linux.g5.4xlarge.nvidia.gpu)	9m 7s
pytorch_tutorial_build_worker (3, 15, linux.g5.4xlarge.nvidia.gpu)	9m 58s
pytorch_tutorial_build_worker (11, 15, linux.g5.4xlarge.nvidia.gpu)	9m 1s
pytorch_tutorial_build_worker (8, 15, linux.g5.4xlarge.nvidia.gpu)	6m 17s
pytorch_tutorial_build_worker (13, 15, linux.g5.4xlarge.nvidia.gpu)	9m 1s
pytorch_tutorial_build_worker (6, 15, linux.g5.4xlarge.nvidia.gpu)	8m 59s
pytorch_tutorial_build_manager	0s
	2h 20m 56s

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