HDF5DataLayer: remove redundant shuffle
HDF5DataLayer: remove redundant shuffle

gogartom/caffe-textmaps,CZCV/s-dilation-caffe,tackgeun/caffe,CZCV/s-dilation-caffe,wangg12/caffe,wangg12/caffe,longjon/caffe,longjon/caffe,gnina/gnina,longjon/caffe,longjon/caffe,CZCV/s-dilation-caffe,wangg12/caffe,tackgeun/caffe,wangg12/caffe,gnina/gnina,CZCV/s-dilation-caffe,tackgeun/caffe,gnina/gnina,gogartom/caffe-textmaps,tackgeun/caffe,gnina/gnina,gogartom/caffe-textmaps,gnina/gnina,gogartom/caffe-textmaps,gnina/gnina