8076543: Add @modules as needed to the langtools testsReviewed-by: jjg, shurailine
8062348: langtools tests should close file manager (group 1)Reviewed-by: darcy
7086071: tools/javac/7079713/TestCircularClassfile.java fails on windowsSummary: delete file before renaming another file to itReviewed-by: jjg
7079713: javac hangs when compiling a class that references a cyclically inherited classSummary: Types.membersClosure needs to handle pathological cases of cyclic inheritanceReviewed-by: jjg, jjh