Hadoop cleanup and module version bump.

Hadoop cleanup and module version bump.
* a pass cleaning up the style.
* adjusted some regular expressions in the file contexts: .* is the same as (.*)? since * means 0 or more matches.
* renamed a few interfaces
* two rules that I dropped as they require further explanation

> +files_read_all_files(hadoop_t)

A very big privilege.

and

> +fs_associate(hadoop_tasktracker_t)

This is a domain, so the only files with this type should be the /proc/pid ones, which don't require associate permissions.