Refine test cases for synchronous GLAutoDrawable display, swap-buffer and read-pixels (non-MSAA and MSAA) Bugs: 841, 975 and 1020

.. add Platform and GL info !
FBObject Cleanup: Add comments about maxSamples > 0 implies fullFBOSupport; bind(): Set dedicated read/write if fullFBOSupport

- Add comments about maxSamples > 0 implies fullFBOSupport

- bind(): Set dedicated read/write if fullFBOSupport
  as done in syncSamplingSink() and unbind()
TestGLReadBuffer01GLJPanelAWT: Add keyFrame-wait after init