Fix OHLCModel model
Fix OHLCModel model

dmadeka/bqplot,SylvainCorlay/bqplot,bloomberg/bqplot,dmadeka/bqplot,ChakriCherukuri/bqplot,bloomberg/bqplot,SylvainCorlay/bqplot,SylvainCorlay/bqplot,ChakriCherukuri/bqplot,bloomberg/bqplot,ChakriCherukuri/bqplot