KRACOEUS-7894: fixed questionnaire rendering issue

KRACOEUS-7832:fixed js error with selects
here's an example, the p:onChangeScript generates this code.

jQuery('#u1vth3v2_line0_line1').on('change', function(e) {Kc.Questionnaire.Answer.answerChanged(this);});

however the id u1vth3v2_line0_line1 is used on multiple places in the page that is rendered.