backups: use a real targetId

src/test/backups-test.js

@@ -14,7 +14,7 @@ const backups = require('../backups.js'),
     safe = require('safetydance');
 
 describe('backups', function () {
-    const { setup, cleanup } = common;
+    const { setup, cleanup, getDefaultBackupTarget } = common;
 
     const boxBackup = {
         id: null,
@@ -52,13 +52,12 @@ describe('backups', function () {
 
     before(async function () {
         await setup();
-        defaultBackupTarget = await backupTargets._getDefault();
+        defaultBackupTarget = await getDefaultBackupTarget();
         boxBackup.targetId = defaultBackupTarget.id;
         appBackup.targetId = defaultBackupTarget.id;
     });
     after(cleanup);
 
-
     describe('crud', function () {
         it('add succeeds', async function () {
             boxBackup.id = await backups.add(boxBackup);