Support for both /users/ and /u/ paths

test/javascripts/acceptance/user-anonymous-test.js.es6

@@ -49,6 +49,6 @@ test("Restricted Routes", () => {
   visit("/users/eviltrout/preferences");
 
   andThen(() => {
-    equal(currentURL(), '/users/eviltrout/activity', "it redirects from preferences");
+    equal(currentURL(), '/u/eviltrout/activity', "it redirects from preferences");
   });
 });

test/javascripts/helpers/qunit-helpers.js.es6

@@ -8,6 +8,7 @@ import { resetPluginApi } from 'discourse/lib/plugin-api';
 import { clearCache as clearOutletCache, resetExtraClasses } from 'discourse/lib/plugin-connectors';
 import { clearHTMLCache } from 'discourse/helpers/custom-html';
 import { flushMap } from 'discourse/models/store';
+import { clearRewrites } from 'discourse/lib/url';
 
 
 function currentUser() {
@@ -88,6 +89,7 @@ function acceptance(name, options) {
       clearOutletCache();
       clearHTMLCache();
       resetPluginApi();
+      clearRewrites();
       Discourse.reset();
     }
   });