An illegal reflective access operation has occurred

```
[junit] WARNING: An illegal reflective access operation has occurred
[junit] WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector (file:/C:/Projects/workspaces/jaxb2-basics/j2b/samples/po/target/test-ant-assembly/jaxb2-basics-sample-po-0.11.2-SNAPSHOT/lib/jaxb-runtime-2.3.0.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int)
[junit] WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector
[junit] WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations
[junit] WARNING: All illegal access operations will be denied in a future release
```