Fix to issue 645 - no more error in code generation for setMany method for the
OptionalOneToN multiplicity for associations; also, the related template test
file was changed.  This is a fix to the error in commiting for r4610.



git-svn-id: http://umple.googlecode.com/svn/trunk@4612 6ebf9d09-8eb1-0036-9d08-68c07d1b990a