Checkmk Werk 13110: LDAP: Fix MKLDAPException if "User-ID attribute" is not lower case

ID: 13110 Title: LDAP: Fix MKLDAPException if "User-ID attribute" is not lower case Component: Multisite Level: 1 Class: Bug fix Version: 2.1.0i1 If the User-ID attribute was not entered lower case, e.g. "MyUserAttribute", the LDAP sync failed with the error "cmk.gui.plugins.userdb.ldap_connector.MKLDAPException: The configured User-ID attribute "MyUserAttribute" does not exist for the user...".