inputFile1 = ServerTestUtils.createInputFile(0);
inputFile2 = ServerTestUtils.createInputFile(0);
outputFile = new File(ServerTestUtils.getTempDir() + File.separator + ServerTestUtils.getRandomFilename());
// Create required jar file
JarFileCreator jfc = new JarFileCreator(jarFile);
jfc.addClass(UnionTask.class);
jfc.createJarFile();
// Create job graph
final JobGraph jg = new JobGraph("Job with large DoP (" + numberOfSubtasks + ")");
// input vertex 1