@Before
	public void before() throws Exception {
		if (distributedTestSupport == null) {
			distributedTestSupport = new DefaultDistributedTestSupport();
			distributedTestSupport.startup();
			suiteDetected = false;
		}
	}
Before test execution, ensure that an instance of
{@link #distributedTestSupport} has been created. If the reference
is null, a new instance is created. If a new instance is created,
this test will manage the lifecycle for the test support object.
spring-xd-distributed-test/src/test/java/org/springframework/xd/distributed/test/AbstractDistributedTests.java