Update Underscore build compat to 1.7.0.

test/backbone.html

@@ -44,15 +44,6 @@
 			QUnit.config.asyncRetries = 10;
 			QUnit.config.hidepassed = true;
 
-			// excuse tests we intentionally fail or those with problems
-			QUnit.config.excused = {
-				'Backbone.Router': {
-					'#1695 - hashChange to pushState with search.': [
-						'Expected 1 assertions, but 0 were run'
-					]
-				}
-			};
-
 			// load Lo-Dash
 			if (!ui.isModularize) {
 				document.write('<script src="' + ui.buildPath + '"><\/script>');