[streaming] Added JobGraphBuilder getter to StreamExecEnv

flink-addons/flink-streaming/src/main/java/eu/stratosphere/api/datastream/StreamExecutionEnvironment.java

@@ -102,4 +102,8 @@ public class StreamExecutionEnvironment {
 		jobGraphBuilder.setSource(returnStream.getId(), DummySource.class);
 		return returnStream;
 	}
+
+	public JobGraphBuilder jobGB() {
+		return jobGraphBuilder;
+	}
 }

flink-addons/flink-streaming/src/test/java/eu/stratosphere/streaming/api/DataStreamTest.java

@@ -38,6 +38,7 @@ public class DataStreamTest {
 
 		DataStream<Tuple1<String>> dataStream = context.setDummySource().flatMap(new MyFlatMap());
 
+		JobGraphBuilder jgb = context.jobGB();
 		
 		context.execute(dataStream.getId());
 //