Adapt LDAP scheme for keycloak
We currently have a separate WSO2 class in LDAP, which we do not need anymore with keycloak.
We should rename that class to "fairlogin" and remove some attributes, which we do not need anymore with keycloak.
If done, we suggest to delete all LDAP entries and re-import the accounts with the script from @armin.felder - please publish script here in gitlab + docu