[VOL-4103] Fixed dmi port-forward on periodic bbsim pipeline

Change-Id: Ie621cf8909f3dc7fdc01894946ab64a7e0e33ff3
diff --git a/jjb/pipeline/voltha/master/periodic-bbsim-tests.groovy b/jjb/pipeline/voltha/master/periodic-bbsim-tests.groovy
index d05a406..fb49076 100755
--- a/jjb/pipeline/voltha/master/periodic-bbsim-tests.groovy
+++ b/jjb/pipeline/voltha/master/periodic-bbsim-tests.groovy
@@ -97,7 +97,7 @@
       JENKINS_NODE_COOKIE="dontKillMe" _TAG="voltha-infra-kafka" bash -c "while true; do kubectl port-forward --address 0.0.0.0 -n ${infraNamespace} svc/voltha-infra-kafka 9092:9092; done"&
       bbsimDmiPortFwd=50075
       for i in {0..${olts.toInteger() - 1}}; do
-        JENKINS_NODE_COOKIE="dontKillMe" _TAG="bbsim\${i}" bash -c "while true; do kubectl port-forward --address 0.0.0.0 -n ${volthaNamespace} svc/bbsim\${i} 50075:\${bbsimDmiPortFwd}; done"&
+        JENKINS_NODE_COOKIE="dontKillMe" _TAG="bbsim\${i}" bash -c "while true; do kubectl port-forward --address 0.0.0.0 -n ${volthaNamespace} svc/bbsim\${i} \${bbsimDmiPortFwd}:50075; done"&
         ((bbsimDmiPortFwd++))
       done
       ps aux | grep port-forward