Groups deleted in ldap server still appear in ldap group configuration.

[SergioBertolinSG]

Steps to reproduce:

1. Setup an ldap server, select all groups in the groups tab.
2. Remove a group from ldap server.
3. Go to ldap configuration in administration page, go to groups tab, and check the selected groups table.

Expected behaviour:

Removed groups from ldap server doesn't appear in that table.

Actual behaviour

Removed groups from ldap server are kept in that selected table.

Server configuration

Operating system: Ubuntu 16.04

Web server: Apache

Database: MySQL

PHP version: 7.0

ownCloud version: (see ownCloud admin page) {"installed":true,"maintenance":false,"version":"9.1.4.1","versionstring":"9.1.4 RC2","edition":"Enterprise"}

Updated from an older ownCloud or fresh install: Fresh

The content of config/config.php:

Are you using external storage, if yes which one: local/smb/sftp/... No

Are you using encryption: No

Logs

Client configuration

Chrome.