Fix tests

Author: benmccann

test/specs/controller.bar.tests.js

@@ -1593,8 +1593,9 @@ describe('Chart.controllers.bar', function() {
 			var meta = chart.getDatasetMeta(0);
 			var yScale = chart.scales[meta.yAxisID];
 
-			var categoryPercentage = yScale.options.categoryPercentage;
-			var barPercentage = yScale.options.barPercentage;
+			var config = meta.controller._config;
+			var categoryPercentage = config.categoryPercentage;
+			var barPercentage = config.barPercentage;
 			var stacked = yScale.options.stacked;
 
 			var totalBarHeight = 0;