Fix DQN w RNN tutorial #4883

Job	Run time
pytorch_tutorial_build_worker (9, 15, linux.g5.4xlarge.nvidia.gpu)	21m 25s
pytorch_tutorial_build_worker (7, 15, linux.g5.4xlarge.nvidia.gpu)	24m 4s
pytorch_tutorial_build_worker (1, 15, linux.g5.12xlarge.nvidia.gpu)	16m 22s
pytorch_tutorial_build_worker (5, 15, linux.g5.4xlarge.nvidia.gpu)	24m 39s
pytorch_tutorial_build_worker (4, 15, linux.g5.4xlarge.nvidia.gpu)	34m 13s
pytorch_tutorial_build_worker (2, 15, linux.g5.4xlarge.nvidia.gpu)	25m 22s
pytorch_tutorial_build_worker (13, 15, linux.g5.4xlarge.nvidia.gpu)	17m 33s
pytorch_tutorial_build_worker (6, 15, linux.g5.4xlarge.nvidia.gpu)	31m 9s
pytorch_tutorial_build_worker (8, 15, linux.g5.4xlarge.nvidia.gpu)	27m 3s
pytorch_tutorial_build_worker (3, 15, linux.g5.4xlarge.nvidia.gpu)	23m 30s
pytorch_tutorial_build_worker (10, 15, linux.g5.4xlarge.nvidia.gpu)	18m 58s
pytorch_tutorial_build_worker (12, 15, linux.g5.4xlarge.nvidia.gpu)	16m 44s
pytorch_tutorial_build_worker (11, 15, linux.g5.4xlarge.nvidia.gpu)	16m 19s
pytorch_tutorial_build_worker (15, 15, linux.g5.4xlarge.nvidia.gpu)	21m 14s
pytorch_tutorial_build_worker (14, 15, linux.g5.4xlarge.nvidia.gpu)	29m 26s
pytorch_tutorial_build_manager	-1s
	5h 48m 0s

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