Remove defaults and fix CI

Author: etimberg

samples/scales/gridlines-scriptable.html

@@ -48,14 +48,14 @@
 						gridLines: {
 							drawBorder: false,
 							color: function(context) {
-                                if (context.tick.value > 0) {
-                                    return window.chartColors.green;
-                                } else if (context.tick.value < 0) {
-                                    return window.chartColors.red;
-                                }
+								if (context.tick.value > 0) {
+									return window.chartColors.green;
+								} else if (context.tick.value < 0) {
+									return window.chartColors.red;
+								}
 
-                                return '#000000';
-                            },
+								return '#000000';
+							},
 						},
 					}]
 				}

src/core/core.scale.js

@@ -1017,10 +1017,10 @@ var Scale = Element.extend({
 				tick,
 			};
 
-			lineWidth = resolve([gridLines.lineWidth, 1], context, i);
-			lineColor = resolve([gridLines.color, 'rgba(0,0,0,0.1)'], context, i);
+			lineWidth = resolve([gridLines.lineWidth], context, i);
+			lineColor = resolve([gridLines.color], context, i);
 			borderDash = gridLines.borderDash || [];
-			borderDashOffset = resolve([gridLines.borderDashOffset, 0], context, i);
+			borderDashOffset = resolve([gridLines.borderDashOffset], context, i);
 
 			lineValue = getPixelForGridLine(me, tick._index || i, offsetGridLines);