Fix c3po docker build

Change-Id: I76214e654467f7c2bd64ed13ad97ebf699eb59db
diff --git a/jjb/pipeline/docker-publish.groovy b/jjb/pipeline/docker-publish.groovy
index 3b80806..316d429 100644
--- a/jjb/pipeline/docker-publish.groovy
+++ b/jjb/pipeline/docker-publish.groovy
@@ -31,6 +31,7 @@
             [$class: 'WipeWorkspace'],
             [$class: 'RelativeTargetDirectory', relativeTargetDir: "${params.projectName}"],
             [$class: 'CloneOption', depth: 0, noTags: false, reference: '', shallow: false],
+            [$class: 'SubmoduleOption', recursiveSubmodules: true],
           ],
         ])
         script {