Changes

changes due to code cleanup in gluegen.
     - StringBuffer -> StringBuilder
     - ReflectionUtil.getBaseName -> class.getSimpleName()
     - cleanup imports, generics and @Override for all touched classes

Clean/Fix: Threading Code

- Remove unsafe double checked locking
- Annotate safe double checked locking (volatile)
- use 'static final' if possible

Code cleanup: override, imports, StringBuilder, ..

Attempt to analyze failed AWT UI tests, where no paint is being issued to GLCanvas.