[classlib] test suites

[Geir Magnusson Jr]

I'm looking at doing a quick integration of test scripts so we can test 
from the top...

I notice that there are "AllTests" classes in luni, for example, that 
use the TestSuite approach.

Why use this mechanism if the intention is all tests anyway?  Just 
curious.  I can see using it for things like performance (maybe) or 
grouping important and interesting subsets, but I'm used to configuring 
ant to do an   **/*Test.java and then it's just "drop in and go".

geir