[Webtest] unit test reporting

[Paul King]

I have added unit test reporting to the site. While these aren't always 
interesting if they have all passed, it does give an indication of which 
areas of the code are well covered by unit tests and which ones executed 
slowly.

To do this I broke the link between all of the AllTests classes. That 
is, they no longer include the AllTests of lower subdirectories. All of 
the AllTests classes are just picked up by ant in a filespec to the 
batchtest element. I had to do this to get junitreport to split out the 
different packages.

I think this is a reasonable compromise between just getting ant to 
include all *Test classes (which would include unit tests in areas of 
the code being worked on and possibly broken) and the fully linked up 
approach. Let me know if this is going to cause lots of pain and I can 
convert back.

An added bonus is that you can now call ant to perform a single test.

 > ant unitTest
(will run all of the unit tests)

 > ant unitTest 
-DtestClass=com.canoo.webtest.extension.applet.runner.AllTests
(will run all applet runner related tests)

 > ant unitTest 
-DtestClass=com.canoo.webtest.steps.store.StorePropertyStepTest
(will run just the StorePropertyStepTest test)

Cheers, Paul.