qnetd: Fix dpd timer

qnetd: Fix dpd timer

With default config of running dpd timer every 10 second and waiting for
2 * client_timeout to clear message received flag and then waiting
another 2 * client_timeout without message received it was possible that
client was marked as a dead after more than 40 seconds making qdevice to
stop sending votequorum hearbeat for too long so corosync lost votes
from qdevice.

This patch is simpler solution which just changes default dpd timer to
1 second and timeout to 1.2 * client_timeout.

Signed-off-by: Jan Friesse <jfriesse@redhat.com>