extend timeout range to 1h
extend timeout range to 1h

Summary: we have large file that needed to be fetch onto the machine occasionally at the beginning of the training, if the fetch time is more than 30 minutes, other processes on the same machine will time out. extending the timeout to try avoiding this.

Reviewed By: ppwwyyxx

Differential Revision: D24849497

fbshipit-source-id: 03e22091a0ab3de9dc4f1fcf2cfaa906b36ccc74

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