Checkmk Werk 14467: LDAP: Fix name conflict if new connector is used

ID: 14467 Title: LDAP: Fix name conflict if new connector is used Component: Multisite Level: 1 Class: Bug fix Version: 2.2.0i1 Since werk #13501 the user connector is used to only contact connections, the user is configured for. If a connection was deleted and a new one was used, the user still had the deleted connector in his profile, leading to messages like "SKIP SYNC "MY_USER" (name conflict with user from "MY_OLD_CONNECTION" connector)" in ~/var/log/web.log on LDAP logging set to debug. We now make sure that the connection still exists.