Move back to use stable binaries 2.7. #4288

Job	Run time
pytorch_tutorial_build_worker (8, 15, linux.g5.4xlarge.nvidia.gpu)	15m 17s
pytorch_tutorial_build_worker (6, 15, linux.g5.4xlarge.nvidia.gpu)	21m 56s
pytorch_tutorial_build_worker (10, 15, linux.g5.4xlarge.nvidia.gpu)	17m 19s
pytorch_tutorial_build_worker (2, 15, linux.g5.4xlarge.nvidia.gpu)	35m 39s
pytorch_tutorial_build_worker (7, 15, linux.g5.4xlarge.nvidia.gpu)	27m 22s
pytorch_tutorial_build_worker (13, 15, linux.g5.4xlarge.nvidia.gpu)	28m 51s
pytorch_tutorial_build_worker (1, 15, linux.g5.12xlarge.nvidia.gpu)	15m 41s
pytorch_tutorial_build_worker (12, 15, linux.g5.4xlarge.nvidia.gpu)	20m 40s
pytorch_tutorial_build_worker (14, 15, linux.g5.4xlarge.nvidia.gpu)	25m 59s
pytorch_tutorial_build_worker (3, 15, linux.g5.4xlarge.nvidia.gpu)	21m 43s
pytorch_tutorial_build_worker (9, 15, linux.g5.4xlarge.nvidia.gpu)	17m 36s
pytorch_tutorial_build_worker (4, 15, linux.g5.4xlarge.nvidia.gpu)	31m 38s
pytorch_tutorial_build_worker (11, 15, linux.g5.4xlarge.nvidia.gpu)	15m 20s
pytorch_tutorial_build_worker (5, 15, linux.g5.4xlarge.nvidia.gpu)	23m 10s
pytorch_tutorial_build_worker (15, 15, linux.g5.4xlarge.nvidia.gpu)	29m 32s
pytorch_tutorial_build_manager	0s
	5h 47m 43s

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