reset changes on js/logger.js, mock logger.js in global_vars tests, workaround for failing dev_console test

tests/unit/mocks/logger.js

@@ -0,0 +1,20 @@
+(function (root, factory) {
+	// Node, CommonJS-like
+	module.exports = factory(root.config);
+})(this, function (config) {
+	let logLevel = {
+		debug: function () {},
+		log: function () {},
+		info: function () {},
+		warn: function () {},
+		error: function () {},
+		group: function () {},
+		groupCollapsed: function () {},
+		groupEnd: function () {},
+		time: function () {},
+		timeEnd: function () {},
+		timeStamp: function () {}
+	};
+
+	return logLevel;
+});