Update populateUserData in createProject to return a promise

Author: catarak

server/controllers/project.controller/createProject.js

@@ -17,17 +17,12 @@ export default function createProject(req, res) {
   }
 
   function populateUserData(newProject) {
-    return Project.populate(
-      newProject,
-      { path: 'user', select: 'username' },
-      (err, newProjectWithUser) => {
-        if (err) {
-          sendFailure();
-          return;
-        }
-        res.json(newProjectWithUser);
-      }
-    );
+    return Project.populate(newProject, {
+      path: 'user',
+      select: 'username'
+    }).then((newProjectWithUser) => {
+      res.json(newProjectWithUser);
+    });
   }
 
   return Project.create(projectValues)