fixing param variable in pipeline script

Change-Id: I558400efa7573523391b3647139a6e413028159b
diff --git a/jjb/pipeline/workflow-validations.groovy b/jjb/pipeline/workflow-validations.groovy
index 4e51eb0..67dffbe 100644
--- a/jjb/pipeline/workflow-validations.groovy
+++ b/jjb/pipeline/workflow-validations.groovy
@@ -30,7 +30,7 @@
           poll: false,
           scm: [$class: 'RepoScm', \
             manifestRepositoryUrl: "${params.manifestUrl}", \
-            manifestBranch: "${params.branch}", \
+            manifestBranch: "${params.manifestBranch}", \
             currentBranch: true, \
             destinationDir: 'cord', \
             forceSync: true,