scripts: CTDB lockvol ping-timeout should be 10secs

Users often forget to update the ping-timeout, perhaps
we should take care of this automatically

Change-Id: I6d14df8aa52665847233cb1760dfd54f41baadec
BUG: 1091600
Signed-off-by: Harshavardhana <harsha@harshavardhana.net>
Reviewed-on: http://review.gluster.org/7569
Reviewed-by: Raghavendra Talur <rtalur@redhat.com>
Reviewed-by: Niels de Vos <ndevos@redhat.com>
Reviewed-by: Jose A. Rivera <jarrpa@redhat.com>
Tested-by: Gluster Build System <jenkins@build.gluster.com>
Reviewed-by: Vijay Bellur <vbellur@redhat.com>