+++ This bug was initially created as a clone of Bug #1258340 +++

Description of problem:
========================
when we trigger a detach tier start on a tier vol, it shows in the volume status task as "remove brick" instead of "Detach tier". This is ambiguous.


Version-Release number of selected component (if applicable):
===========================================================
 
[root@nag-manual-node1 ~]# gluster --version
glusterfs 3.7.3 built on Aug 27 2015 01:23:05
Repository revision: git://git.gluster.com/glusterfs.git
Copyright (c) 2006-2011 Gluster Inc. <http://www.gluster.com>
GlusterFS comes with ABSOLUTELY NO WARRANTY.
You may redistribute copies of GlusterFS under the terms of the GNU General Public License.
[root@nag-manual-node1 ~]# rpm -qa|grep gluster
glusterfs-libs-3.7.3-0.82.git6c4096f.el6.x86_64
glusterfs-fuse-3.7.3-0.82.git6c4096f.el6.x86_64
glusterfs-server-3.7.3-0.82.git6c4096f.el6.x86_64
glusterfs-3.7.3-0.82.git6c4096f.el6.x86_64
glusterfs-api-3.7.3-0.82.git6c4096f.el6.x86_64
glusterfs-cli-3.7.3-0.82.git6c4096f.el6.x86_64
python-gluster-3.7.3-0.82.git6c4096f.el6.noarch
glusterfs-client-xlators-3.7.3-0.82.git6c4096f.el6.x86_64




Steps to Reproduce:
===================
1.create a tier vol and start it
2.issue a detach tier start
3. check the vol status.

Actual results:
==============
It shows as remove brick in process rather than detach tier as below
[root@tettnang glusterfs]# gluster v status xyz
Status of volume: xyz
Gluster process                             TCP Port  RDMA Port  Online  Pid
------------------------------------------------------------------------------
Hot Bricks:
Brick yarrow:/rhs/brick7/xyz                49163     0          Y       7147 
Brick tettnang:/rhs/brick7/xyz              49161     0          Y       21091
Cold Bricks:
Brick tettnang:/rhs/brick1/xyz              49159     0          Y       20879
Brick yarrow:/rhs/brick1/xyz                49161     0          Y       7075 
Brick tettnang:/rhs/brick2/xyz              49160     0          Y       20901
Brick yarrow:/rhs/brick2/xyz                49162     0          Y       7093 
NFS Server on localhost                     N/A       N/A        N       N/A  
NFS Server on zod                           N/A       N/A        N       N/A  
NFS Server on yarrow                        N/A       N/A        N       N/A  
 
Task Status of Volume xyz
------------------------------------------------------------------------------
Task                 : Remove brick        
ID                   : ddfd6e52-d789-4d43-98cc-8378c9db5aa4
Removed bricks:     
tettnang:/rhs/brick7/xyz
yarrow:/rhs/brick7/xyz
Status               : completed           



Expected results:
=================
It should mention task as "detach tier"

--- Additional comment from nchilaka on 2015-08-31 02:38:53 EDT ---

marking priority as urgent, given that it is very obvious and visible to the user

--- Additional comment from Mohammed Rafi KC on 2015-09-01 08:31:53 EDT ---