TestShutdownCompleteNEWT revealed that EGLDrawableFactory won't be properly
re-created within subsequent GLProfile/GLDrawableFactory initSingleton()
after a GLProfile.shutdown() call.
Hence after the shutdown() call, subsequent GLProfile have no EGLDrawableFactory available and hence may not have a default device existent in case no desktop-factory is available.
Allow EGLDrawableFactory to be re-created after a shutdown().
Allow EGLDrawableFactory re-creation after shutdown() - be functional