[SYNCOPE-465] Adding AjaxFormChoiceComponentUpdatingBehavior to CheckGroup

git-svn-id: https://svn.apache.org/repos/asf/syncope/branches/1_1_X@1554232 13f79535-47bb-0310-9956-ffa450edef68
[SYNCOPE-465] Merge from 1_1_X

git-svn-id: https://svn.apache.org/repos/asf/syncope/trunk@1554382 13f79535-47bb-0310-9956-ffa450edef68