Give canary hwtests time till the next run to complete.

1. we see weird (non fatal) delays in running hwtests
2. devices in pool:bvt are just sitting idle between canaries
3. Tpms ask for timed out suite reruns
4. Build sheriffs are confused about how to handle a timeout
5. Most timeouts happen because of suites competing for DUTs

It shouldn't hurt to give the canaries time till the next run.
We should find a better way to monitor 1, one that doesn't involve
failing a build.

TEST=Trybot, unittests.
BUG=chromium:342502, chromium:351381

Change-Id: Ib8ec7cac87b1250eb3c3a28663c0ff2393045903
(cherry picked from commit 8971f9fcc5f12297aaac2f662e35a332651a2eb7)
Tested-by: Prashanth B <>
Reviewed-by: Dharani Govindan <>
Tested-by: Dharani Govindan <>
Reviewed-by: Aviv Keshet <>
Commit-Queue: Prashanth B <>
3 files changed