Only run one specific test

[Yinon Ehrlich]

>
> Yes, that works indeed. But in practice the modules_to_import list is
> filled by parsing the contents of a test/*.py directory. That's why I
> import dynamically with __import__.
>
> Nevertheless, you got me on the right track. After I explicitly added
> the modules to the global namespace (globals()["mytest"] =
> __import__("mytest")), it works fine. Thx!

Another way to do it is using imp.load_source,
see http://waf.googlecode.com/svn/trunk/test/Test.py
  Yinon