Try to get Jenkinsfile running

Jenkinsfile

@@ -7,13 +7,8 @@ node {
 }
 
   stage('Build') {
-    sh '''
-      echo "===>  Initialising submodules"
-      git submodule init
-
-      echo "===>  Compiling and building DEB package"
-      '${mvnHome}/bin/mvn' -U clean verify -Ptextgrid.deb
-    '''
+    sh "git submodule init"
+    sh "'${mvnHome}/bin/mvn' -U clean verify -Ptextgrid.deb"
   }
 
   stage('Publish') {