Start using req.resources = { app, volume, ...} pattern

Reason was that req.app was clashing with expressjs v5 which
stores the main expressjs app object there

src/routes/applinks.js

@@ -25,7 +25,7 @@ async function load(req, res, next) {
     if (error) return next(BoxError.toHttpError(error));
     if (!result) return next(new HttpError(404, 'Applink not found'));
 
-    req.resource = result;
+    req.resources.applink = result;
 
     next();
 }
@@ -63,9 +63,9 @@ async function get(req, res, next) {
     assert.strictEqual(typeof req.params.id, 'string');
 
     // we have a separate route for this
-    delete req.resource.icon;
+    delete req.resources.applink.icon;
 
-    next(new HttpSuccess(200, req.resource));
+    next(new HttpSuccess(200, req.resources.applink));
 }
 
 async function update(req, res, next) {
@@ -78,7 +78,7 @@ async function update(req, res, next) {
     if ('tags' in req.body && !Array.isArray(req.body.tags)) return next(new HttpError(400, 'tags must be an array with strings'));
     if ('icon' in req.body && typeof req.body.icon !== 'string') return next(new HttpError(400, 'icon must be a string'));
 
-    const [error] = await safe(applinks.update(req.resource, req.body));
+    const [error] = await safe(applinks.update(req.resources.applink, req.body));
     if (error) return next(BoxError.toHttpError(error));
 
     next(new HttpSuccess(200, {}));
@@ -87,14 +87,14 @@ async function update(req, res, next) {
 async function del(req, res, next) {
     assert.strictEqual(typeof req.params.id, 'string');
 
-    const [error] = await safe(applinks.del(req.resource));
+    const [error] = await safe(applinks.del(req.resources.applink));
     if (error) return next(BoxError.toHttpError(error));
 
     next(new HttpSuccess(204));
 }
 
-async function getIcon(req, res, next) {
+async function getIcon(req, res) {
     assert.strictEqual(typeof req.params.id, 'string');
 
-    res.send(req.resource.icon);
+    res.send(req.resources.applink.icon);
 }