Created by: tonyyang-svail

test_LayerGrad: ConvTransProjection test dilation=2 if build with cudnn>6.0. The dimension calculation is not correct for dilation==2 case.

Related PR: https://github.com/PaddlePaddle/Paddle/pull/5956 Failed Log: https://paddleci.ngrok.io/viewLog.html?tab=buildLog&buildTypeId=Paddle_PrCi&buildId=19791