gluster/uss: Don't send failure when accessing snap with name
same as entry-point name

In a scenario, if the snap name is same as the snap-directory than cd to
snaps/snaps fails.
Send a lookup to snap-view server instead of failing

Change-Id: Ie7b811815ff30961500592bbc8cdb514a9d76ef5
BUG: 1164613
Signed-off-by: vmallika <vmallika@redhat.com>
Reviewed-on: http://review.gluster.org/9135
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Rajesh Joseph <rjoseph@redhat.com>
Reviewed-by: Avra Sengupta <asengupt@redhat.com>
Reviewed-by: Krishnan Parthasarathi <kparthas@redhat.com>
Tested-by: Krishnan Parthasarathi <kparthas@redhat.com>