Regarding LDAP configuration in settings.json:
When admin uses the "propertyMap" to map LDAP certain attributes to 4Minitz attributes like username/longname/email for every imported user, currently it is also necessary to add these attributes to the "whiteListedFields".

If admin forgets the later, the mapping maps only "null" values.

We should automatically add all LDAP attributes of the propertyMap to the whiteListedFields.