Minor version upgrades: xstream, groovy, slf4j and logback

git-svn-id: https://svn.apache.org/repos/asf/syncope/branches/1_1_X@1574386 13f79535-47bb-0310-9956-ffa450edef68
Merge from 1_1_X and Jackson upgrade

git-svn-id: https://svn.apache.org/repos/asf/syncope/trunk@1574387 13f79535-47bb-0310-9956-ffa450edef68