Move back to 2.7 #4301

Job	Run time
pytorch_tutorial_build_worker (3, 15, linux.g5.4xlarge.nvidia.gpu)	21m 11s
pytorch_tutorial_build_worker (2, 15, linux.g5.4xlarge.nvidia.gpu)	23m 32s
pytorch_tutorial_build_worker (5, 15, linux.g5.4xlarge.nvidia.gpu)	22m 46s
pytorch_tutorial_build_worker (1, 15, linux.g5.12xlarge.nvidia.gpu)	14m 53s
pytorch_tutorial_build_worker (4, 15, linux.g5.4xlarge.nvidia.gpu)	23m 52s
pytorch_tutorial_build_worker (7, 15, linux.g5.4xlarge.nvidia.gpu)	23m 52s
pytorch_tutorial_build_worker (10, 15, linux.g5.4xlarge.nvidia.gpu)	16m 13s
pytorch_tutorial_build_worker (14, 15, linux.g5.4xlarge.nvidia.gpu)	23m 52s
pytorch_tutorial_build_worker (15, 15, linux.g5.4xlarge.nvidia.gpu)	23m 53s
pytorch_tutorial_build_worker (13, 15, linux.g5.4xlarge.nvidia.gpu)	23m 36s
pytorch_tutorial_build_worker (9, 15, linux.g5.4xlarge.nvidia.gpu)	15m 19s
pytorch_tutorial_build_worker (12, 15, linux.g5.4xlarge.nvidia.gpu)	20m 35s
pytorch_tutorial_build_worker (11, 15, linux.g5.4xlarge.nvidia.gpu)	13m 4s
pytorch_tutorial_build_worker (8, 15, linux.g5.4xlarge.nvidia.gpu)	14m 29s
pytorch_tutorial_build_worker (6, 15, linux.g5.4xlarge.nvidia.gpu)	21m 13s
pytorch_tutorial_build_manager	1s
	5h 2m 21s

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