checkout voltha group with repo

Change-Id: I9093cfbe84ad835f0a48fa6343b018eaa0a82c59
diff --git a/scripts/cord-bootstrap.sh b/scripts/cord-bootstrap.sh
index 760c304..1ecc732 100644
--- a/scripts/cord-bootstrap.sh
+++ b/scripts/cord-bootstrap.sh
@@ -42,7 +42,7 @@
     fi
 
     mkdir $CORDDIR && cd $CORDDIR
-    repo init -u https://gerrit.opencord.org/manifest -b master -g build,onos,orchestration
+    repo init -u https://gerrit.opencord.org/manifest -b master -g build,onos,orchestration,voltha
     repo sync
 
     # check out gerrit branches using repo