extend questionnaireElement model
* QE: add column options, active, required
* QE: removed column name
* AD: removed column text
use column text to display 'questiontext' in stead of (removed) name
extend data fixture, define 3 questionnaire in hierarchical model
* test questionnaire with 2 pages and group question
* test questionnaire 2,3 with 1 page
* answerDomain for questions not yet defined