JimEvans: fixing test_dotnet target in rakefile to actually run the .NET Firefox tests.
JimEvans: fixing test_dotnet target in rakefile to actually run the .NET Firefox tests.

r12516

krosenvold/selenium-git-release-candidate,krosenvold/selenium-git-release-candidate,krosenvold/selenium-git-release-candidate,krosenvold/selenium-git-release-candidate,krosenvold/selenium-git-release-candidate,krosenvold/selenium-git-release-candidate,krosenvold/selenium-git-release-candidate,krosenvold/selenium-git-release-candidate