Add missing comma in pipelina

Change-Id: I3ea9df7da6c012f963c0895f947a1690edadc9c4
diff --git a/test-system-reclass-pipeline.groovy b/test-system-reclass-pipeline.groovy
index a334020..8a8fbac 100644
--- a/test-system-reclass-pipeline.groovy
+++ b/test-system-reclass-pipeline.groovy
@@ -61,7 +61,7 @@
             branches["${cluster}"] = {
               build job: "test-salt-model-${cluster}", parameters: [
                 [$class: 'StringParameterValue', name: 'DEFAULT_GIT_URL', value: clusterGitUrl],
-                [$class: 'StringParameterValue', name: 'DEFAULT_GIT_REF', value: "HEAD"]
+                [$class: 'StringParameterValue', name: 'DEFAULT_GIT_REF', value: "HEAD"],
                 [$class: 'StringParameterValue', name: 'SYSTEM_GIT_URL', value: defaultGitUrl],
                 [$class: 'StringParameterValue', name: 'SYSTEM_GIT_REF', value: systemRefspec]
               ]