add missing arg

src/apps.js

@@ -1979,7 +1979,8 @@ function listBackups(app, page, perPage, callback) {
     });
 }
 
-function restoreInstalledApps(callback) {
+function restoreInstalledApps(options, callback) {
+    assert.strictEqual(typeof options, 'object');
     assert.strictEqual(typeof callback, 'function');
 
     getAll(function (error, apps) {
@@ -2002,7 +2003,7 @@ function restoreInstalledApps(callback) {
                 }
 
                 const task = {
-                    args: { restoreConfig, skipDnsSetup: false, overwriteDns: true, oldManifest },
+                    args: { restoreConfig, skipDnsSetup: options.skipDnsSetup, overwriteDns: true, oldManifest },
                     values: {},
                     scheduleNow: false, // task will be scheduled by autoRestartTasks when platform is ready
                     requireNullTaskId: false // ignore existing stale taskId