[DCAE] Add istanbul branch for CLM jobs

Change-Id: I833d0ebe8e0c55241a913e71cc0c5140e0e81a80
Signed-off-by: vv770d <vv770d@att.com>
Issue-ID: DCAEGEN2-3060
Signed-off-by: vv770d <vv770d@att.com>
diff --git a/jjb/dcaegen2/dcaegen2-platform-mod2-helm-generator.yaml b/jjb/dcaegen2/dcaegen2-platform-mod2-helm-generator.yaml
index 5533c9e..6840746 100644
--- a/jjb/dcaegen2/dcaegen2-platform-mod2-helm-generator.yaml
+++ b/jjb/dcaegen2/dcaegen2-platform-mod2-helm-generator.yaml
@@ -63,5 +63,9 @@
     project: 'dcaegen2/platform'
     project-name: dcaegen2-platform-mod2-helm-generator
     mvn-params: '-f mod2/helm-generator/pom.xml'
-    branch: 'master'
+    stream:
+      - 'master':
+          branch: 'master'
+      - 'istanbul':
+          branch: 'istanbul'
     mvn-settings: 'dcaegen2-platform-settings'