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.