Detect if running under Gump and if so run tests in headless mode
Detect if running under Gump and if so run tests in headless mode


git-svn-id: https://svn.apache.org/repos/asf/jakarta/jmeter/trunk@323775 13f79535-47bb-0310-9956-ffa450edef68

Former-commit-id: 8e2bb9bebddf4efcf86e880a726e5f5cb2f61d15
etnetera/jmeter,etnetera/jmeter,ham1/jmeter,ham1/jmeter,etnetera/jmeter,benbenw/jmeter,benbenw/jmeter,benbenw/jmeter,apache/jmeter,etnetera/jmeter,apache/jmeter,apache/jmeter,ham1/jmeter,apache/jmeter,etnetera/jmeter,apache/jmeter,ham1/jmeter,benbenw/jmeter,ham1/jmeter