Fix ImagenetExperiment.create_*_loader
Fix ImagenetExperiment.create_*_loader

Set the default config during load_dataset rather than create_loaders

subutai/nupic.research,numenta/nupic.research,mrcslws/nupic.research,numenta/nupic.research,subutai/nupic.research,mrcslws/nupic.research