Increase raft timeout to 10min so we get complete logs from older devices.

Devices like dory get slammed when bugreports are taken and can't
compress all the raft logs in the current 5min timeout. Our dogfooders
spend their precious time getting us bugreports and then we can't act
on them because we have broken raft logs. :(

This change bumps up the timeout in the hopes that we can get complete
logs from even our slowest devices.

Change-Id: I10741a6185b39544f4c0531f0ee74864d74a1aa4