RepositoryService repositoryService = activitiRule.getRepositoryService();
repositoryService.createDeployment().addInputStream("MultiInstanceBug.bpmn20.xml", new FileInputStream(filename)).deploy();
RuntimeService runtimeService = activitiRule.getRuntimeService();
Map<String, Object> variableMap = new HashMap<String, Object>();
variableMap.put("users", Arrays.asList(new Object[] {"user1", "user2", "user3"}));
ProcessInstance processInstance = runtimeService.startProcessInstanceByKey("MultiInstanceBug", variableMap);
assertNotNull(processInstance.getId());
System.out.println("id " + processInstance.getId() + " " + processInstance.getProcessDefinitionId());
TaskService taskService = activitiRule.getTaskService();
List<Task> list = taskService.createTaskQuery().list();