Add remount route for mountlike backup storages

src/storage/s3.js

@@ -14,6 +14,8 @@ exports = module.exports = {
     remove,
     removeDir,
 
+    remount,
+
     testConfig,
     removePrivateFields,
     injectPrivateFields,
@@ -474,6 +476,13 @@ function removeDir(apiConfig, pathPrefix) {
     return events;
 }
 
+function remount(apiConfig, callback) {
+    assert.strictEqual(typeof apiConfig, 'object');
+    assert.strictEqual(typeof callback, 'function');
+
+    return callback(new BoxError(BoxError.NOT_SUPPORTED));
+}
+
 function testConfig(apiConfig, callback) {
     assert.strictEqual(typeof apiConfig, 'object');
     assert.strictEqual(typeof callback, 'function');