rename getRootPath to getBackupRootPath

src/storage/noop.js

@@ -1,7 +1,7 @@
 'use strict';
 
 exports = module.exports = {
-    getRootPath,
+    getBackupRootPath,
     checkBackupPreconditions,
 
     upload,
@@ -26,7 +26,7 @@ const assert = require('assert'),
     DataLayout = require('../datalayout.js'),
     debug = require('debug')('box:storage/noop');
 
-function getRootPath(apiConfig) {
+function getBackupRootPath(apiConfig) {
     assert.strictEqual(typeof apiConfig, 'object');
     return '';
 }