Description of problem
when replace-brick is performed, a glusterfs client process is started to migrate the data. executing "mount" command is displaying the replace-brick started glusterfs process also. 

This client process should not be displayed in the mount output as it is internal process started by replace-brick.  

Version-Release number of selected component (if applicable):
mainline

How reproducible:
often

Steps to Reproduce:
1.create a volume. start volume
2.perform replace-brick <old_brick> <new_brick>
3.execute "mount" command on the storage node where replace-brick is started. 
  
Actual results:
[03/26/12 - 22:39:18 root@APP-SERVER1 dstore1]# mount
/dev/sda3 on / type ext4 (rw)
proc on /proc type proc (rw)
sysfs on /sys type sysfs (rw)
devpts on /dev/pts type devpts (rw,gid=5,mode=620)
tmpfs on /dev/shm type tmpfs (rw)
/dev/sda1 on /boot type ext3 (rw)
none on /proc/sys/fs/binfmt_misc type binfmt_misc (rw)
sunrpc on /var/lib/nfs/rpc_pipefs type rpc_pipefs (rw)
/dev/sdb1 on /export1 type ext4 (rw)
/dev/sdc1 on /export2 type xfs (rw)
/etc/glusterd/vols/dstore/rb_client.vol on /etc/glusterd/vols/dstore/rb_mount type fuse.glusterfs (rw,default_permissions,allow_other,max_read=131072)