cli :remove-brick process output leads to ambiguity

The output of remove-brick  status as "Not started" leads to
ambiguity.We should not show the status of the Server nodes
which do not participate in the remove-brick process.

Change-Id: I85fea40deb15f3e2dd5487d881f48c9aff7221de
BUG: 986896
Signed-off-by: susant <spalai@redhat.com>
Reviewed-on: http://review.gluster.org/5383
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>