volume shrink (remove-brick) in GD2

[atinmu]

ReST APIs to be defined:

  remove-brick start
  remove-brick stop
  remove-brick commit {force}
  remove-brick status

[atinmu]

@aravindavk can you please help in defining the ReST APIs for the above?

[aravindavk]

Depends on Rebalance.

@nbalacha Is remove brick status same as rebalance status? Please update the steps involved in remove brick similar to #428

[atinmu]

Kamal has volunteered to work on this.

[atinmu]

@kmlmhnn Circling back on this to check the status of this enhancement, please update.