public void setupSourceDataFiles(String sourceDir, String fileName, String data) {
		setupDataFiles(containerResolver.getContainerHostForSource(), sourceDir, fileName, data);
	}
Creates a file in a source directory for file source base tests.

@param sourceDir The directory to place the file
@param fileName The name of the file where the data will be written
@param data The data to be written to the file
spring-xd-integration-test/src/test/java/org/springframework/xd/integration/test/AbstractIntegrationTest.java