merge settingsdb into settings code

src/apps.js

@@ -615,7 +615,9 @@ function scheduleTask(appId, installationState, taskId, callback) {
     assert.strictEqual(typeof taskId, 'string');
     assert.strictEqual(typeof callback, 'function');
 
-    settings.getBackupConfig(function (error, backupConfig) {
+    const getBackupConfig = util.callbackify(settings.getBackupConfig);
+
+    getBackupConfig(function (error, backupConfig) {
         if (error) return callback(error);
 
         let memoryLimit = 400;