[SYNCOPE-143] Removing any LAF preference to trigger default look and feel for any operating system

git-svn-id: https://svn.apache.org/repos/asf/syncope/branches/1_2_X@1623390 13f79535-47bb-0310-9956-ffa450edef68
Updating IzPack

git-svn-id: https://svn.apache.org/repos/asf/syncope/branches/1_2_X@1623395 13f79535-47bb-0310-9956-ffa450edef68
[SYNCOPE-143] Merge from 1_2_X

git-svn-id: https://svn.apache.org/repos/asf/syncope/trunk@1623397 13f79535-47bb-0310-9956-ffa450edef68