Remove DOCTYPE, as it is not allowed by xstream 1.4.9 anymore. Followup to r1761294
Remove DOCTYPE, as it is not allowed by xstream 1.4.9 anymore. Followup to r1761294

git-svn-id: https://svn.apache.org/repos/asf/jmeter/trunk@1761612 13f79535-47bb-0310-9956-ffa450edef68

Former-commit-id: e61f34782b252171b4128dcc0f8d3659a42da01e
ham1/jmeter,etnetera/jmeter,ham1/jmeter,benbenw/jmeter,etnetera/jmeter,apache/jmeter,etnetera/jmeter,ham1/jmeter,apache/jmeter,apache/jmeter,etnetera/jmeter,etnetera/jmeter,benbenw/jmeter,benbenw/jmeter,benbenw/jmeter,ham1/jmeter,apache/jmeter,ham1/jmeter,apache/jmeter