fixing sh Sleep to sh sleep

Change-Id: I99f6c71b015eb62aafe394fa950190be28a74400
diff --git a/Jenkinsfile-rcordlite-zerotouch b/Jenkinsfile-rcordlite-zerotouch
index 8c2b79d..df09cd0 100644
--- a/Jenkinsfile-rcordlite-zerotouch
+++ b/Jenkinsfile-rcordlite-zerotouch
@@ -89,7 +89,7 @@
                     cd /home/cord/helm-charts
                     helm install --name cord-kafka --set replicas=1 --set persistence.enabled=false --set zookeeper.servers=1 --set zookeeper.persistence.enabled=false incubator/kafka
                     helm install --name voltha-kafka --set replicas=1 --set persistence.enabled=false --set zookeeper.servers=1 --set zookeeper.persistence.enabled=false incubator/kafka
-                    Sleep 120
+                    sleep 120
                     """
                 } catch(error) { currentBuild.result = 'FAILURE' }
             }