WebUI: don't change casing of Auth Indicators values
    
    All values were previously converted to lowercase which was not
    coresponding with CLI behaviour. Now they stay as they are
    inserted. I also have to change the strings to lowercase because
    the otp and radius should be inserted as lowercase words.
    
    https://fedorahosted.org/freeipa/ticket/6308
    
    Reviewed-By: Petr Vobornik <pvoborni@redhat.com>