Fix for iterator transformation.  Need to set retType=dtUnknown and/or retExprType=NULL so that resolve can work.  This checkin now passes 3 of the tuple tests.  The other two tests with iterators+tuples, test_instantiate3 and test_instantiate3a contain recursive iterator calls.
Fix for iterator transformation.  Need to set retType=dtUnknown and/or
retExprType=NULL so that resolve can work.  This checkin now passes
3 of the tuple tests.  The other two tests with iterators+tuples,
test_instantiate3 and test_instantiate3a contain recursive iterator calls.


git-svn-id: 88467cb1fb04b8a755be7e1ee1026be4190196ef@7137 3a8e244f-b0f2-452b-bcba-4c88e055c3ca

CoryMcCartan/chapel,sungeunchoi/chapel,CoryMcCartan/chapel,sungeunchoi/chapel,hildeth/chapel,chizarlicious/chapel,hildeth/chapel,hildeth/chapel,sungeunchoi/chapel,hildeth/chapel,sungeunchoi/chapel,sungeunchoi/chapel,CoryMcCartan/chapel,chizarlicious/chapel,hildeth/chapel,CoryMcCartan/chapel,chizarlicious/chapel,chizarlicious/chapel,CoryMcCartan/chapel,hildeth/chapel,chizarlicious/chapel,chizarlicious/chapel,CoryMcCartan/chapel,CoryMcCartan/chapel,hildeth/chapel,sungeunchoi/chapel,sungeunchoi/chapel,chizarlicious/chapel,sungeunchoi/chapel