Use exit(1) for error; document why final exit is needed
Use exit(1) for error; document why final exit is needed

git-svn-id: https://svn.apache.org/repos/asf/jakarta/jmeter/trunk@584560 13f79535-47bb-0310-9956-ffa450edef68

Former-commit-id: 1b43722d6ada313c2d1d09b0e8a97359f11b2308
benbenw/jmeter,apache/jmeter,benbenw/jmeter,ham1/jmeter,benbenw/jmeter,etnetera/jmeter,apache/jmeter,etnetera/jmeter,apache/jmeter,ham1/jmeter,ham1/jmeter,ham1/jmeter,ham1/jmeter,etnetera/jmeter,benbenw/jmeter,apache/jmeter,etnetera/jmeter,etnetera/jmeter,apache/jmeter