Add reference to JMeterThread.last_sample_ok
Add reference to JMeterThread.last_sample_ok

git-svn-id: https://svn.apache.org/repos/asf/jakarta/jmeter/branches/rel-2-1@368833 13f79535-47bb-0310-9956-ffa450edef68

Former-commit-id: a41e1b0416378802e1275171c49bd148130f514c
benbenw/jmeter,apache/jmeter,ham1/jmeter,apache/jmeter,benbenw/jmeter,benbenw/jmeter,apache/jmeter,ham1/jmeter,etnetera/jmeter,etnetera/jmeter,etnetera/jmeter,ham1/jmeter,ham1/jmeter,etnetera/jmeter,apache/jmeter,ham1/jmeter,benbenw/jmeter,etnetera/jmeter,apache/jmeter