Ensure we always have a features object expected by that version

src/appstore.js

@@ -54,7 +54,7 @@ const apps = require('./apps.js'),
 
 // These are the default options and will be adjusted once a subscription state is obtained
 // Keep in sync with appstore/routes/cloudrons.js
-let gFeatures = {
+const gFeatures = {
     appMaxCount: 2,
     userMaxCount: 5,
     domainMaxCount: 1,
@@ -78,7 +78,9 @@ let gFeatures = {
 
 // attempt to load feature cache in case appstore would be down
 const tmp = safe.JSON.parse(safe.fs.readFileSync(paths.FEATURES_INFO_FILE, 'utf8'));
-if (tmp) gFeatures = tmp;
+for (const f in gFeatures) {
+    if (typeof tmp[f] !== 'undefined') gFeatures[f] = tmp[f];
+}
 
 function getFeatures() {
     return gFeatures;
@@ -148,7 +150,9 @@ async function getSubscription() {
     if (response.status !== 200) throw new BoxError(BoxError.EXTERNAL_ERROR, `Unknown error: ${response.status} ${JSON.stringify(response.body)}`);
 
     // update the features cache
-    gFeatures = response.body.features;
+    for (const f in gFeatures) {
+        if (typeof response.body.features[f] !== 'undefined') gFeatures[f] = response.body.features[f];
+    }
     safe.fs.writeFileSync(paths.FEATURES_INFO_FILE, JSON.stringify(gFeatures), 'utf8');
 
     return response.body;