rdma: Client volfile name change for supporting rdma

For rdma only volumes, daemons like snapd, glustershd
etc make use of tcp transport for their operations.
This patch will introduce the support of rdma by default
for those daemons in rdma only volumes. In order to
accomodate this change we rename the tcp client volfile
labels from
<volname>-fuse.vol
to
<volname>.tcp-fuse.vol

Change-Id: Id9727b97d00e62a4a1556b9c0c56653d45c8fe1d
BUG: 1164079
Signed-off-by: Anoop C S <achiraya@redhat.com>
Reviewed-on: http://review.gluster.org/9146
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Kaushal M <kaushal@redhat.com>