Add CORD Helm chart repository to lint job

Change-Id: Ifee3d151afea32cdc7ae6ee5f87fca31d67a0f5c
diff --git a/jjb/lint.yaml b/jjb/lint.yaml
index 566bca2..7db3452 100644
--- a/jjb/lint.yaml
+++ b/jjb/lint.yaml
@@ -128,6 +128,7 @@
       - shell: |
           helm init --client-only
           helm repo add incubator https://kubernetes-charts-incubator.storage.googleapis.com/
+          helm repo add cord https://charts.opencord.org/master
 
       - shell: !include-raw-escape: shell/helmlint.sh