#20 Squeak 3.9a SUnit Error handling

[Ron Teitelbaum USMedRec.com]

sunitExitWith: was removed from Exception

it was moved to ResumableTestFailure

see:
http://www.metaprog.com/downloads/ResumableTestFailure
s.pdf

Causes errrors in

GlorpDatabaseBasicTest>>#testDropMissingTable
GlorpMessageCollectorTest>>#testMessageCollectorDNU

Ron Teitelbaum
Ron@USMedRec.com

With previous changes these are the only errors for
all SUNIT tests on Squeak 3.9b-7035 wiht PostgresV2-
yj.5.mcz

http://www.squeaksource.com/PostgresV2/PostgresV2-
yj.5.mcz