gluster: Set ping-timeout between glusterd peer rpc connection

With Patch# http://review.gluster.org/#/c/7753/, ping-timeout
got disabled between glusterd peer rpc connection.
This would create regression for bug#1034479

Change-Id: Ib7a756fce7d349ce5b7b4c6a287f2d040c83fc76
BUG: 1097224
Signed-off-by: Vijaikumar M <vmallika@redhat.com>
Reviewed-on: http://review.gluster.org/7989
Reviewed-by: Rajesh Joseph <rjoseph@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Krishnan Parthasarathi <kparthas@redhat.com>
Tested-by: Krishnan Parthasarathi <kparthas@redhat.com>