Updates the TaskRepository createTaskExecution to support TaskExecution param

resolves #223

Updated to use TaskExecution when creating new executions for test.

spring-cloud-task-core/src/main/java/org/springframework/cloud/task/listener/TaskLifecycleListener.java

@@ -204,8 +204,13 @@ public class TaskLifecycleListener implements ApplicationListener<ApplicationEve
 						this.taskNameResolver.getTaskName(), new Date(), args, taskProperties.getExternalExecutionId());
 			}
 			else {
+				TaskExecution taskExecution = new TaskExecution();
+				taskExecution.setTaskName(this.taskNameResolver.getTaskName());
+				taskExecution.setStartTime(new Date());
+				taskExecution.setArguments(args);
+				taskExecution.setExternalExecutionId(taskProperties.getExternalExecutionId());
 				this.taskExecution = this.taskRepository.createTaskExecution(
-						this.taskNameResolver.getTaskName(), new Date(), args, taskProperties.getExternalExecutionId());
+						taskExecution);
 			}
 		}
 		else {

spring-cloud-task-core/src/main/java/org/springframework/cloud/task/repository/TaskRepository.java

@@ -59,15 +59,16 @@ public interface TaskRepository {
 	/**
 	 * Notifies the repository that a taskExecution needs to be created.
 	 *
-	 * @param taskName the name that associated with the task execution.
-	 * @param startTime the time task began.
-	 * @param arguments list of key/value pairs that configure the task.
-	 * @param externalExecutionId id assigned to the task by the platform.
-	 * @return the initial {@link TaskExecution}
+	 * @param taskExecution a TaskExecution instance containing the startTime,
+	 * arguments and externalExecutionId that will be stored in the repository.
+	 * Only the values enumerated above will be stored for this
+	 * TaskExecution.
+	 * @return the {@link TaskExecution} that was stored in the repository.  The
+	 * TaskExecution's taskExecutionId will also contain the id that was used
+	 * to store the TaskExecution.
 	 */
 	@Transactional
-	TaskExecution createTaskExecution(String taskName,
-			Date startTime,List<String> arguments, String externalExecutionId);
+	TaskExecution createTaskExecution(TaskExecution taskExecution);
 
 	/**
 	 * Creates an empty TaskExecution with just an id provided. This is intended to be

spring-cloud-task-core/src/main/java/org/springframework/cloud/task/repository/support/SimpleTaskRepository.java

@@ -101,14 +101,17 @@ public class SimpleTaskRepository implements TaskRepository {
 	}
 
 	@Override
-	public TaskExecution createTaskExecution(String taskName,
-			Date startTime,List<String> arguments, String externalExecutionId) {
+	public TaskExecution createTaskExecution(TaskExecution taskExecution) {
 		initialize();
-		validateCreateInformation(startTime, taskName);
-		TaskExecution taskExecution =
-				taskExecutionDao.createTaskExecution(taskName, startTime, arguments, externalExecutionId);
+		validateCreateInformation(taskExecution);
+		TaskExecution daoTaskExecution =
+				taskExecutionDao.createTaskExecution(
+						taskExecution.getTaskName(),
+						taskExecution.getStartTime(),
+						taskExecution.getArguments(),
+						taskExecution.getExternalExecutionId());
 		logger.debug("Creating: " + taskExecution.toString());
-		return taskExecution;
+		return daoTaskExecution;
 	}
 
 	@Override
@@ -155,11 +158,11 @@ public class SimpleTaskRepository implements TaskRepository {
 	/**
 	 * Validate startTime and taskName are valid.
 	 */
-	private void validateCreateInformation(Date startTime, String taskName) {
-		Assert.notNull(startTime, "TaskExecution start time cannot be null.");
+	private void validateCreateInformation(TaskExecution taskExecution) {
+		Assert.notNull(taskExecution.getStartTime(), "TaskExecution start time cannot be null.");
 
-		if (taskName != null &&
-				taskName.length() > this.maxTaskNameSize) {
+		if (taskExecution.getTaskName() != null &&
+				taskExecution.getTaskName().length() > this.maxTaskNameSize) {
 			throw new IllegalArgumentException("TaskName length exceeds "
 					+ this.maxTaskNameSize + " characters");
 		}