Changed __C.CNTK to __C.DATA

[DaveVoyles]

I believe there may have been a typo here. The *_config.py files in the utils/configs directory all have DATA and not CNTK as a property.

Grocery_config.py

# data set config
__C.DATA.DATASET = "Grocery"
__C.DATA.MAP_FILE_PATH = "../../DataSets/Grocery"
__C.DATA.CLASS_MAP_FILE = "class_map.txt"
__C.DATA.TRAIN_MAP_FILE = "train_img_file.txt"
__C.DATA.TRAIN_ROI_FILE = "train_roi_file.txt"
__C.DATA.TEST_MAP_FILE = "test_img_file.txt"
__C.DATA.TEST_ROI_FILE = "test_roi_file.txt"
__C.DATA.NUM_TRAIN_IMAGES = 20
__C.DATA.NUM_TEST_IMAGES = 5
__C.DATA.PROPOSAL_LAYER_SCALES = [4, 8, 12]

[opbldsb6]

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