protocol/client,server: Suppress ESTALE logs

        Backport of http://review.gluster.org/7696

Change-Id: I5372b45243ad9a68a7c20290e9f5fd5ca9ab28f2
BUG: 1095256
Signed-off-by: Pranith Kumar K <pkarampu@redhat.com>
Reviewed-on: http://review.gluster.org/8087
Reviewed-by: Atin Mukherjee <amukherj@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Niels de Vos <ndevos@redhat.com>