Upsampling.getMemoryReport ArrayIndexOutOfBoundsException

[jxtps]

Issue Description

Calling Upsampling.getMemoryReport leads to an ArrayIndexOutOfBoundsException:

Exception in thread "main" java.lang.ArrayIndexOutOfBoundsException: 2
	at org.deeplearning4j.nn.conf.layers.Upsampling2D.getMemoryReport(Upsampling2D.java:119)
	at org.deeplearning4j.nn.conf.graph.LayerVertex.getMemoryReport(LayerVertex.java:147)
	at org.deeplearning4j.nn.conf.ComputationGraphConfiguration.getMemoryReport(ComputationGraphConfiguration.java:635)

Looking at the source code, it currently reads:

val im2colSizePerEx = c.getChannels() * outputType.getHeight() * outputType.getWidth() 
    * size[0] * size[1] * size[2];

Presumably it should be:

val im2colSizePerEx = c.getChannels() * outputType.getHeight() * outputType.getWidth() 
    * size[0] * size[1];

(i.e. drop * size[2]) since the layer only has 2 dimensions.

[AlexDBlack]

Thanks for the issue/fix: #8015