Fixing Jenkinsfile

Change-Id: Icde878e06648d5e82b4e1669e30ed45766eea3f4
diff --git a/Jenkinsfile b/Jenkinsfile
index 18527a3..d357afd 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -57,7 +57,7 @@
             }
        }
        dir('build/platform-install') {
-            sh `ansible-playbook -i inventory/mock-rcord teardown-playbook.yml`
+            sh 'ansible-playbook -i inventory/mock-rcord teardown-playbook.yml'
             echo "RESULT: ${currentBuild.result}"
        }
     }