update crontab

[bhny]

We can remove map from crontab and add mesh-watchdog.sh. Also bmxhealth can be every 5 minutes instead of once a day. I think qMp adds "mdns reload" with random time during setup (that is fine). bmx6health.sh is also probably done during qMp setup, so we need to edit that somehow.
Here is suggested list-

* * * * * /root/mesh-watchdog.sh
*/5 * * * * /etc/qmp/bmx6health.sh >> /tmp/log/bmx6health.log
* * * * * /etc/nycmesh/check_tunnel.sh
0 * * * * /etc/init.d/mdns reload > /tmp/log/mdns.log