8076543: Add @modules as needed to the langtools tests
Reviewed-by: jjg, shurailine

8062348: langtools tests should close file manager (group 1)
Reviewed-by: darcy

8041648: do while loop that misses ending semicolon has wrong end position
Summary: Ensure the end positions are meaningful even if statement's semicolon is missing.
Reviewed-by: jjg
Contributed-by: dusan.balek@oracle.com, jan.lahoda@oracle.com