add test_nodes.vty

Automatically picked up by the vty-test target, by file name extension.

Change-Id: I8dba373cee1be954504f79c3305b0111071757e7
diff --git a/tests/Makefile.am b/tests/Makefile.am
index 8f1826d..cddea0b 100644
--- a/tests/Makefile.am
+++ b/tests/Makefile.am
@@ -26,6 +26,7 @@
 	testsuite.at \
 	$(srcdir)/package.m4 \
 	$(TESTSUITE) \
+	test_nodes.vty \
 	test_subscriber.vty \
 	ctrl_test_runner.py \
 	$(NULL)