Update to latest XStream License
Update to latest XStream License

git-svn-id: https://svn.apache.org/repos/asf/jakarta/jmeter/branches/rel-2-2@554096 13f79535-47bb-0310-9956-ffa450edef68

Former-commit-id: 173cfd7431d5acecdabcefb907ff115082f7119e
etnetera/jmeter,ham1/jmeter,etnetera/jmeter,ham1/jmeter,etnetera/jmeter,apache/jmeter,benbenw/jmeter,apache/jmeter,ham1/jmeter,apache/jmeter,benbenw/jmeter,benbenw/jmeter,etnetera/jmeter,benbenw/jmeter,apache/jmeter,ham1/jmeter,apache/jmeter,ham1/jmeter,etnetera/jmeter