Remamed UnitKitTests to TestUnitKit to be consistent with test bundle names we 
use elsewhere.

Made TestUnitKit the default scheme to run the test suite.


git-svn-id: http://svn.gna.org/svn/etoile/trunk/Etoile/Frameworks/UnitKit@10438 7b3f36aa-e6db-49c1-8b4c-66eac1997e64