[SYNCOPE-466] Replacing IllegalArgumentException thrown on server side with more appropriate exception

git-svn-id: https://svn.apache.org/repos/asf/syncope/branches/1_1_X@1554186 13f79535-47bb-0310-9956-ffa450edef68
Updating cargo to 1.4.6

git-svn-id: https://svn.apache.org/repos/asf/syncope/branches/1_1_X@1554187 13f79535-47bb-0310-9956-ffa450edef68
[SYNCOPE-466] Merge from 1_1_X

git-svn-id: https://svn.apache.org/repos/asf/syncope/trunk@1554190 13f79535-47bb-0310-9956-ffa450edef68