Add prepare and 2.run_java_gui_app;
2.run_java_gui_app: check if can run simple Java Hello GUI application.
Test works fine in both winxp sp3 and win2k3 sp2.
svn path=/trunk/ahk_tests/; revision=1914
Improve uninstall process, reduce waiting time, increase it where needed, use more reliable methods for windows to close/appear.
The install test works fine in clean snapshot of win2k3 sp2.
svn path=/trunk/ahk_tests/; revision=1776