fix(server): fix some bluebird warnings

fixes #2412, #2363

Author: Awk34

Diff for: templates/app/server/api/user(auth)/user.controller.js

@@ -146,7 +146,7 @@ export function me(req, res, next) {
       if (!user) {
         return res.status(401).end();
       }
-      res.json(user);
+      return res.json(user);
     })
     .catch(err => next(err));
 }

Diff for: templates/app/server/auth(auth)/auth.service.js

@@ -42,6 +42,7 @@ export function isAuthenticated() {
           }
           req.user = user;
           next();
+          return null;
         })
         .catch(err => next(err));
     });

Diff for: templates/endpoint/basename.controller.js

@@ -42,7 +42,7 @@ function removeEntity(res) {
       <% if(filters.mongooseModels) { %>return entity.remove()<% }
          if(filters.sequelizeModels) { %>return entity.destroy()<% } %>
         .then(() => {
-          res.status(204).end();
+          return res.status(204).end();
         });
     }
   };