Add optional xml preprocessing line
Add optional xml preprocessing line

git-svn-id: https://svn.apache.org/repos/asf/jakarta/jmeter/branches/rel-2-1@389955 13f79535-47bb-0310-9956-ffa450edef68

Former-commit-id: 0b835a7a2b951af35534a99c5eaaaa7ae9f210f7
ham1/jmeter,etnetera/jmeter,apache/jmeter,apache/jmeter,ham1/jmeter,benbenw/jmeter,ham1/jmeter,apache/jmeter,etnetera/jmeter,benbenw/jmeter,benbenw/jmeter,etnetera/jmeter,etnetera/jmeter,apache/jmeter,ham1/jmeter,benbenw/jmeter,ham1/jmeter,etnetera/jmeter,apache/jmeter