HadoopFileSystem doesn't Support Recursive Globs (**)

The LocalFileSystem supports recursive globs, **, through use of the glob syntax and it would be nice to similarly allow it in the HadoopFileSystem.

The FileSystem docs say:

All FileSystem implementations should support glob in the final hierarchical path component of ResourceIdT. This allows SDK libraries to construct file system agnostic spec. FileSystems can support additional patterns for user-provided specs.

This clearly points out that recursive globs aren't required but may be supported as an additional pattern for user-provided specs.