Move back to use stable binaries 2.7. #4244

Job	Run time
pytorch_tutorial_build_worker (2, 15, linux.g5.4xlarge.nvidia.gpu)	48m 30s
pytorch_tutorial_build_worker (1, 15, linux.g5.12xlarge.nvidia.gpu)	30m 47s
pytorch_tutorial_build_worker (12, 15, linux.g5.4xlarge.nvidia.gpu)	35m 32s
pytorch_tutorial_build_worker (11, 15, linux.g5.4xlarge.nvidia.gpu)	31m 11s
pytorch_tutorial_build_worker (6, 15, linux.g5.4xlarge.nvidia.gpu)	36m 59s
pytorch_tutorial_build_worker (3, 15, linux.g5.4xlarge.nvidia.gpu)	38m 0s
pytorch_tutorial_build_worker (7, 15, linux.g5.4xlarge.nvidia.gpu)	41m 15s
pytorch_tutorial_build_worker (4, 15, linux.g5.4xlarge.nvidia.gpu)	30m 2s
pytorch_tutorial_build_worker (9, 15, linux.g5.4xlarge.nvidia.gpu)	33m 44s
pytorch_tutorial_build_worker (14, 15, linux.g5.4xlarge.nvidia.gpu)	39m 50s
pytorch_tutorial_build_worker (15, 15, linux.g5.4xlarge.nvidia.gpu)	43m 45s
pytorch_tutorial_build_worker (8, 15, linux.g5.4xlarge.nvidia.gpu)	30m 58s
pytorch_tutorial_build_worker (13, 15, linux.g5.4xlarge.nvidia.gpu)	32m 8s
pytorch_tutorial_build_worker (5, 15, linux.g5.4xlarge.nvidia.gpu)	39m 51s
pytorch_tutorial_build_worker (10, 15, linux.g5.4xlarge.nvidia.gpu)	33m 16s
pytorch_tutorial_build_manager	0s
	9h 5m 48s

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