Fix repository already exists error

Change-Id: I0f4a3bd59d539964302227c8bdd832eba51c5d18
Signed-off-by: Serkant Uluderya <serkant.uluderya@netsia.com>
diff --git a/vars/volthaDeploy.groovy b/vars/volthaDeploy.groovy
index 01a51d7..2735b7a 100644
--- a/vars/volthaDeploy.groovy
+++ b/vars/volthaDeploy.groovy
@@ -117,8 +117,7 @@
 
     sh(label  : 'Configure helm repo',
        script : """
-helm repo add onf https://charts.lfbroadband.org
-helm repo update
+helm repo add onf https://charts.lfbroadband.org || helm repo update
 """)
 
     // ---------------------