Move back to 2.7 #4316

Job	Run time
pytorch_tutorial_build_worker (2, 15, linux.g5.4xlarge.nvidia.gpu)	36m 23s
pytorch_tutorial_build_worker (4, 15, linux.g5.4xlarge.nvidia.gpu)	33m 40s
pytorch_tutorial_build_worker (1, 15, linux.g5.12xlarge.nvidia.gpu)	15m 22s
pytorch_tutorial_build_worker (5, 15, linux.g5.4xlarge.nvidia.gpu)	22m 54s
pytorch_tutorial_build_worker (6, 15, linux.g5.4xlarge.nvidia.gpu)	28m 14s
pytorch_tutorial_build_worker (10, 15, linux.g5.4xlarge.nvidia.gpu)	16m 57s
pytorch_tutorial_build_worker (9, 15, linux.g5.4xlarge.nvidia.gpu)	18m 15s
pytorch_tutorial_build_worker (7, 15, linux.g5.4xlarge.nvidia.gpu)	17m 59s
pytorch_tutorial_build_worker (8, 15, linux.g5.4xlarge.nvidia.gpu)	15m 31s
pytorch_tutorial_build_worker (11, 15, linux.g5.4xlarge.nvidia.gpu)	15m 38s
pytorch_tutorial_build_worker (15, 15, linux.g5.4xlarge.nvidia.gpu)	30m 50s
pytorch_tutorial_build_worker (13, 15, linux.g5.4xlarge.nvidia.gpu)	28m 4s
pytorch_tutorial_build_worker (3, 15, linux.g5.4xlarge.nvidia.gpu)	22m 30s
pytorch_tutorial_build_worker (14, 15, linux.g5.4xlarge.nvidia.gpu)	24m 5s
pytorch_tutorial_build_worker (12, 15, linux.g5.4xlarge.nvidia.gpu)	21m 15s
pytorch_tutorial_build_manager	0s
	5h 47m 37s

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