Add ExternalSystem to generated yaml

Issue-ID: AAI-2208
Change-Id: I1da5722abdbfa6928c2a57d179c9e4d2ad1722c8
Signed-off-by: LaMont, William (wl2432) <wl2432@us.att.com>
diff --git a/aai-annotations/.gitignore b/aai-annotations/.gitignore
index 2f30844..43a5448 100644
--- a/aai-annotations/.gitignore
+++ b/aai-annotations/.gitignore
@@ -1,2 +1,3 @@
 /bin/
 /.checkstyle
+/target/