protected void startContribution() throws Exception {
// Tuscany specific code which starts the contribution holding the test
launcher = NodeLauncher.newInstance();
node = launcher.createNode(testConfiguration.getComposite(),
new Contribution(testConfiguration.getTestName(), getContributionURI()));
System.out.println("SCA Node API ClassLoader: " + node.getClass().getClassLoader());
node.start();
} // end method startContribution