use async test

test/javascripts/lib/user-search-test.js.es6

@@ -61,8 +61,7 @@ QUnit.module("lib:user-search", {
   }
 });
 
-QUnit.test("it places groups unconditionally for exact match", assert => {
-  return userSearch({term: 'Team'}).then((results)=>{
-     assert.equal(results[results.length-1]["name"], "team");
-  });
+QUnit.test("it places groups unconditionally for exact match", async assert => {
+  let results = await userSearch({term: 'Team'});
+  assert.equal(results[results.length-1]["name"], "team");
 });