Lock JDK versions: Java 6 compatible project doesn't compile with JDK 12
diff --git a/Jenkinsfile b/Jenkinsfile
index e9f05f7..a549506 100644
--- a/Jenkinsfile
+++ b/Jenkinsfile
@@ -17,4 +17,4 @@
  * under the License.
  */
 
-asfMavenTlpPlgnBuild()
+asfMavenTlpPlgnBuild(jdk:['7','8','11'])