IVGCVSW-2346 Fix test wrt NEFillBorderKernel index
IVGCVSW-2346 Fix test wrt NEFillBorderKernel index

Kernel position within the layer is part of the kernel name

Change-Id: I3b9ee870fbd0db025f1515c81245f917189ae884

ARM-software/armnn,ARM-software/armnn,ARM-software/armnn