Merge branch 'partitioning_cfg' into 'master'

cfg/encoder_intra_vtm.cfg

cfg/encoder_lowdelay_P_vtm.cfg

cfg/encoder_lowdelay_vtm.cfg

cfg/encoder_randomaccess_vtm.cfg

cfg/multi-layer/two_layers.cfg

...nfigExamples/encoder_randomaccess_vtm_RasterScanSlice.cfg

...es/encoder_randomaccess_vtm_RectangularSliceFixedSize.cfg

...gExamples/encoder_randomaccess_vtm_SingleTilePerSlice.cfg

cfg/partitioning/raster_slice.cfg

cfg/partitioning/raster_slice_1_slice_per_tile.cfg

cfg/partitioning/rect_slice_classB.cfg

cfg/partitioning/rect_slice_fixed_size.cfg

cfg/partitioning/subpicture_3_slice_2_tile.cfg

...itioning/subpicture_3_slice_2_tile_1_slice_per_subpic.cfg

cfg/partitioning/subpicture_4_slice_2_hor_subpic.cfg

cfg/partitioning/subpicture_4_slice_2_ver_subpic.cfg

cfg/partitioning/subpicture_8_slice_12_tile_2_subpic.cfg