Attempt to update/include submodules in final jar on Jenkins

Jenkinsfile

@@ -10,6 +10,7 @@ pipeline {
     stages {
         stage ('Build') {
             steps {
+                sh 'git submodule update --init --recursive'
                 sh 'mvn clean package'
             }
             post {
@@ -49,4 +50,4 @@ pipeline {
             }
         }
     }
-}
+}