AC-8074: npm package grunt-contrib-less upgrade to new major version(3.0.0)

Author: glo17680

package.json.sample

@@ -18,7 +18,7 @@
     "grunt-contrib-cssmin": "~4.0.0",
     "grunt-contrib-imagemin": "~4.0.0",
     "grunt-contrib-jasmine": "~4.0.0",
-    "grunt-contrib-less": "~2.1.0",
+    "grunt-contrib-less": "~3.0.0",
     "grunt-contrib-watch": "~1.1.0",
     "grunt-eslint": "~24.1.0",
     "grunt-exec": "~3.0.0",