Added checkbox task for building on JDK 8 and JDK 11.
This closes
@@ -22,6 +22,7 @@ to ensure the following steps have been taken:
### For code changes:
- [ ] Have you ensured that the full suite of tests is executed via `mvn -Pcontrib-check clean install` at the root `nifi` folder?
- [ ] Have you written or updated unit tests to verify your changes?
+- [ ] Have you verified that the full build is successful on both JDK 8 and JDK 11?
- [ ] If adding new dependencies to the code, are these dependencies licensed in a way that is compatible for inclusion under [ASF 2.0](http://www.apache.org/legal/resolved.html#category-a)?
- [ ] If applicable, have you updated the `LICENSE` file, including the main `LICENSE` file under `nifi-assembly`?
- [ ] If applicable, have you updated the `NOTICE` file, including the main `NOTICE` file found under `nifi-assembly`?
