public static JavaApplication<SimpleJavaApplication> startHsql(Properties systemProperties)
			throws IOException {
		return launch(HsqlServerApplication.class, false, systemProperties, null);
	}
Start an instance of HSQL. Upon test completion, the method
{@link com.oracle.tools.runtime.java.JavaApplication#close()}
should be invoked to shut down the server.

@param systemProperties system properties for new process
@return HSQL server application reference
@throws IOException if an exception is thrown launching the process
spring-xd-distributed-test/src/main/java/org/springframework/xd/distributed/util/ServerProcessUtils.java