Add chmod to CLI

[Kimahriman]

HDFS chmod command

-chmod [-R] <MODE[,MODE]... | OCTALMODE> PATH... :
  Changes permissions of a file. This works similar to the shell's chmod command
  with a few exceptions.
                                                                                 
  -R           modifies the files recursively. This is the only option currently 
               supported.                                                        
  <MODE>       Mode is the same as mode used for the shell's command. The only   
               letters recognized are 'rwxXt', e.g. +t,a+r,g-w,+rwx,o=r.         
  <OCTALMODE>  Mode specifed in 3 or 4 digits. If 4 digits, the first may be 1 or
               0 to turn the sticky bit on or off, respectively.  Unlike the     
               shell command, it is not possible to specify only part of the     
               mode, e.g. 754 is same as u=rwx,g=rx,o=r.                         
  
  If none of 'augo' is specified, 'a' is assumed and unlike the shell command, no
  umask is applied.