This CQ build failed: https://cros-goldeneye.corp.google.com/chromeos/healthmonitoring/buildDetails?buildbucketId=8926922038197706032

The HWTest [bvt-tast-cq] [grunt] step failed with a message that makes it sound like the DUT did not respond:

12/16 22:58:29.814 ERROR|             utils:0287| [stderr] 2018/12/16 22:58:19 Connecting to chromeos2-row3-rack9-host13:22
12/16 22:58:29.815 ERROR|             utils:0287| [stderr] 2018/12/16 22:58:29 Failed to connect to chromeos2-row3-rack9-host13:22: dial tcp 100.115.226.95:22: i/o timeout
12/16 22:59:33.454 ERROR|               log:0027| post-test iteration server sysinfo error:
12/16 22:59:33.455 ERROR|         traceback:0013| Traceback (most recent call last):
12/16 22:59:33.455 ERROR|         traceback:0013|   File "/usr/local/autotest/client/common_lib/log.py", line 25, in decorated_func
12/16 22:59:33.456 ERROR|         traceback:0013|     fn(*args, **dargs)
12/16 22:59:33.456 ERROR|         traceback:0013|   File "/usr/local/autotest/server/test.py", line 66, in wrapper
12/16 22:59:33.456 ERROR|         traceback:0013|     host, at, outputdir = self._install()
12/16 22:59:33.456 ERROR|         traceback:0013|   File "/usr/local/autotest/server/test.py", line 116, in _install
12/16 22:59:33.457 ERROR|         traceback:0013|     self.host.delete_all_tmp_dirs(self.AUTOTEST_PARENT_DIR)
12/16 22:59:33.457 ERROR|         traceback:0013|   File "/usr/local/autotest/server/hosts/remote.py", line 323, in delete_all_tmp_dirs
12/16 22:59:33.457 ERROR|         traceback:0013|     self.run('rm -rf %s' % path, ignore_status=True)
12/16 22:59:33.457 ERROR|         traceback:0013|   File "/usr/local/autotest/server/hosts/ssh_host.py", line 335, in run
12/16 22:59:33.457 ERROR|         traceback:0013|     return self.run_very_slowly(*args, **kwargs)
12/16 22:59:33.458 ERROR|         traceback:0013|   File "/usr/local/autotest/server/hosts/ssh_host.py", line 324, in run_very_slowly
12/16 22:59:33.458 ERROR|         traceback:0013|     ssh_failure_retry_ok)
12/16 22:59:33.458 ERROR|         traceback:0013|   File "/usr/local/autotest/server/hosts/ssh_host.py", line 260, in _run
12/16 22:59:33.458 ERROR|         traceback:0013|     raise error.AutoservSSHTimeout("ssh timed out", result)
12/16 22:59:33.459 ERROR|         traceback:0013| AutoservSSHTimeout: ('ssh timed out', * Command: 
12/16 22:59:33.459 ERROR|         traceback:0013|     /usr/bin/ssh -a -x   -o Protocol=2 -o StrictHostKeyChecking=no -o
12/16 22:59:33.459 ERROR|         traceback:0013|     UserKnownHostsFile=/dev/null -o BatchMode=yes -o ConnectTimeout=30 -o
12/16 22:59:33.459 ERROR|         traceback:0013|     ServerAliveInterval=900 -o ServerAliveCountMax=3 -o ConnectionAttempts=4
12/16 22:59:33.460 ERROR|         traceback:0013|     -l root -p 22 chromeos2-row3-rack9-host13 "export LIBC_FATAL_STDERR_=1; if
12/16 22:59:33.460 ERROR|         traceback:0013|     type \"logger\" > /dev/null 2>&1; then logger -tag \"autotest\"
12/16 22:59:33.460 ERROR|         traceback:0013|     \"server[stack::_install|delete_all_tmp_dirs|run] -> ssh_run(rm -rf
12/16 22:59:33.460 ERROR|         traceback:0013|     \\\"/tmp/sysinfo/autoserv-\\\"*\\\"\\\")\";fi; rm -rf
12/16 22:59:33.460 ERROR|         traceback:0013|     \"/tmp/sysinfo/autoserv-\"*\"\""
12/16 22:59:33.464 ERROR|         traceback:0013| Exit status: 255
12/16 22:59:33.464 ERROR|         traceback:0013| Duration: 63.2005941868
12/16 22:59:33.465 ERROR|         traceback:0013| 
12/16 22:59:33.465 ERROR|         traceback:0013| stderr:
12/16 22:59:33.465 ERROR|         traceback:0013| ssh: connect to host chromeos2-row3-rack9-host13 port 22: Connection timed out)