Move back to use stable binaries 2.7. #4254

Job	Run time
pytorch_tutorial_build_worker (7, 15, linux.g5.4xlarge.nvidia.gpu)	41m 26s
pytorch_tutorial_build_worker (2, 15, linux.g5.4xlarge.nvidia.gpu)	48m 33s
pytorch_tutorial_build_worker (1, 15, linux.g5.12xlarge.nvidia.gpu)	31m 0s
pytorch_tutorial_build_worker (6, 15, linux.g5.4xlarge.nvidia.gpu)	37m 18s
pytorch_tutorial_build_worker (4, 15, linux.g5.4xlarge.nvidia.gpu)	30m 8s
pytorch_tutorial_build_worker (5, 15, linux.g5.4xlarge.nvidia.gpu)	39m 23s
pytorch_tutorial_build_worker (9, 15, linux.g5.4xlarge.nvidia.gpu)	33m 59s
pytorch_tutorial_build_worker (3, 15, linux.g5.4xlarge.nvidia.gpu)	38m 7s
pytorch_tutorial_build_worker (12, 15, linux.g5.4xlarge.nvidia.gpu)	36m 19s
pytorch_tutorial_build_worker (13, 15, linux.g5.4xlarge.nvidia.gpu)	32m 52s
pytorch_tutorial_build_worker (15, 15, linux.g5.4xlarge.nvidia.gpu)	43m 27s
pytorch_tutorial_build_worker (14, 15, linux.g5.4xlarge.nvidia.gpu)	40m 4s
pytorch_tutorial_build_worker (8, 15, linux.g5.4xlarge.nvidia.gpu)	31m 28s
pytorch_tutorial_build_worker (10, 15, linux.g5.4xlarge.nvidia.gpu)	33m 12s
pytorch_tutorial_build_worker (11, 15, linux.g5.4xlarge.nvidia.gpu)	31m 40s
pytorch_tutorial_build_manager	-1s
	9h 8m 55s

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