do not reconfigure apps when infra version has not changed

src/platform.js

@@ -57,7 +57,7 @@ function initialize(callback) {
         createDockerNetwork,
         startAddons.bind(null, existingInfra),
         removeOldImages,
-        existingInfra.version === 'none' ? apps.restoreInstalledApps : apps.configureInstalledApps,
+        startApps.bind(null, existingInfra),
         loadAddonVars,
         fs.writeFile.bind(fs, paths.INFRA_VERSION_FILE, JSON.stringify(infra))
     ], function (error) {
@@ -278,6 +278,19 @@ function startAddons(existingInfra, callback) {
     async.series(startFuncs, callback);
 }
 
+function startApps(existingInfra, callback) {
+    if (existingInfra.version === infra.version) {
+        debug('startApp: apps are already uptodate');
+        callback();
+    } else if (existingInfra.version === 'none') {
+        debug('startApps: restoring installed apps');
+        apps.restoreInstalledApps(callback);
+    } else {
+        debug('startApps: reconfiguring installed apps');
+        apps.configureInstalledApps(callback);
+    }
+}
+
 function loadAddonVars(callback) {
     gAddonVars = {
         mail: ini.parse(fs.readFileSync(paths.DATA_DIR + '/addons/mail_vars.sh', 'utf8')),