Task doesn't use transaction manager on startup

This could be intended behavior, but when an spring cloud task is starting up, it doesn't use the transaction manager when initializing the execution.

Take as an example spring-cloud-task-samples/multiple-datasources. If we change the secondDataSource to disable autocommit, the application will immediately fail on startup because the creation of the execution will be rolled back immediately. after creating it.

	@Bean
	public DataSource secondDataSource() throws SQLException {
		DataSource ds = new EmbeddedDatabaseBuilder()
				.setType(EmbeddedDatabaseType.H2)
				.build();
		SimpleDriverDataSource sdds = ds.unwrap(SimpleDriverDataSource.class);
		Properties properties = new Properties();
		properties.setProperty("autoCommit", "false");
		sdds.setConnectionProperties(properties);
		return ds;
	}

So either all the initialization code should get wrapped in transaction(s), or the documentation should be updated to reflect that you only support data sources with auto-commit set to true.