test_data: add java stanzas to action tests

and rename them to follow the glob conventions for java_gen
diff --git a/test_data/of13/action_output.data b/test_data/of13/action_output.data
index 7cd52ce..7653a30 100644
--- a/test_data/of13/action_output.data
+++ b/test_data/of13/action_output.data
@@ -6,3 +6,5 @@
 00 00 00 00 00 00 # pad
 -- python
 ofp.action.output(port=50, max_len=65535)
+-- java
+builder.setPort(OFPort.of(50)).setMaxLen(65535)