public String getSparkAppJarSource(){
		return sparkAppJarSource;
	}
Sets the location of a source jar that can be copied to the target location where
XD can access the jar
@param sparkAppJarSource the location of the spark app jar.
@return current instance the job.
spring-xd-test-fixtures/src/main/java/org/springframework/xd/test/fixtures/SparkAppJob.java