[spectest] Try to clean up and correct a subtypes test file. It used the wrong keyword, had one test that was wrong and other mess. Fudge it for Rakudo too.
[spectest] Try to clean up and correct a subtypes test file. It used the wrong keyword, had one test that was wrong and other mess. Fudge it for Rakudo too.

git-svn-id: 53605643c415f7495558be95614cf14171f1db78@23051 c213334d-75ef-0310-aa23-eaa082d1ae64

niner/roast,laben/roast,cygx/roast,dogbert17/roast,niner/roast,skids/roast,b2gills/roast,dankogai/roast,niner/roast,dankogai/roast,dankogai/roast,b2gills/roast,cygx/roast,perl6/roast,skids/roast,dogbert17/roast,laben/roast,bitrauser/roast,zostay/roast,laben/roast,bitrauser/roast,skids/roast,zostay/roast,cygx/roast,zostay/roast,b2gills/roast