refector(router): rename outlet integration spec to navigation spec

The new name better reflects the behavior under test.

modules/angular1_router/test/integration/navigation_spec.js

@@ -1,6 +1,6 @@
 'use strict';
 
-describe('ngOutlet', function () {
+describe('navigation', function () {
 
   var elt,
       $compile,

modules/angular2/test/router/integration/navigation_spec.ts

@@ -40,7 +40,7 @@ var cmpInstanceCount;
 var log: string[];
 
 export function main() {
-  describe('Outlet Directive', () => {
+  describe('navigation', () => {
 
     var tcb: TestComponentBuilder;
     var rootTC, rtr;