make fields final
make fields final

git-svn-id: https://svn.apache.org/repos/asf/jmeter/trunk@1380042 13f79535-47bb-0310-9956-ffa450edef68

Former-commit-id: d606ec59e9d46f8393aa484cc158500e757ed973
ham1/jmeter,apache/jmeter,etnetera/jmeter,apache/jmeter,ham1/jmeter,apache/jmeter,benbenw/jmeter,etnetera/jmeter,ham1/jmeter,etnetera/jmeter,ham1/jmeter,apache/jmeter,benbenw/jmeter,ham1/jmeter,etnetera/jmeter,etnetera/jmeter,benbenw/jmeter,benbenw/jmeter,apache/jmeter