message: [bubble-chart] Fixing issue w/ metric names
diff: @@ -947,9 +947,9 @@ class BubbleViz(NVD3Viz):
  return d
  def get_data(self, df):
  - df['x'] = df[[self.x_metric]]
  - df['y'] = df[[self.y_metric]]
  - df['size'] = df[[self.z_metric]]
  + df['x'] = df[[utils.get_metric_name(self.x_metric)]]
  + df['y'] = df[[utils.get_metric_name(self.y_metric)]]
  + df['size'] = df[[utils.get_metric_name(self.z_metric)]]
  df['shape'] = 'circle'
  df['group'] = df[[self.series]]
  