Jdk 11 support.

**Is your feature request related to a problem? Please describe.**
Build or run with jdk 11 error.
1. Build: Cannot resolve symbol 'ObjectSizeCalculator', jdk.nashorn.internal.ir.debug.ObjectSizeCalculator
2. Run: Exception in thread "main" java.lang.ClassCastException: class jdk.internal.loader.ClassLoaders$AppClassLoader cannot be cast to class java.net.URLClassLoader (jdk.internal.loader.ClassLoaders$AppClassLoader and java.net.URLClassLoader are in module java.base of loader 'bootstrap')
at com.dtstack.flinkx.client.Launcher.main(Launcher.java:123)

**Describe the solution you'd like**
1. Maybe use [https://github.com/jbellis/jamm](https://github.com/jbellis/jamm) instead of ObjectSizeCalculator
2.

**Describe alternatives you've considered**

**Additional context**