Caroline PFQ builder has been failing the VM tests.
Chrome OS - 9686.0.0
Chrome - 61.0.3138.0

tradefed harness issues:
  ERROR: Command </tmp/autotest-tradefed-install_SRg0jj/6f0cb3a8c25a34507dc7320e878de111/android-cts-7.1_r6-linux_x86-x86/android-cts/tools/cts-tradefed run commandAndExit cts --module CtsAccountManagerTestCases --precondition-arg skip-media-download --log-level-display=DEBUG --screenshot-on-failure --disable-reboot --logcat-on-failure> failed, rc=-15, Command(s) did not complete within 360 seconds
/tmp/cbuildbotv9018V/smoke_suite/test_harness/all/SimpleTestVerify/1_autotest_tests/results-02-cheets_CTS_N.7.1_r6.x86.CtsAccountManagerTestCases/cheets_CTS_N.CtsAccountManagerTestCases                     [  FAILED  ]
/tmp/cbuildbotv9018V/smoke_suite/test_harness/all/SimpleTestVerify/1_autotest_tests/results-02-cheets_CTS_N.7.1_r6.x86.CtsAccountManagerTestCases/cheets_CTS_N.CtsAccountManagerTestCases                       ERROR: Command </tmp/autotest-tradefed-install_SRg0jj/6f0cb3a8c25a34507dc7320e878de111/android-cts-7.1_r6-linux_x86-x86/android-cts/tools/cts-tradefed run commandAndExit cts --module CtsAccountManagerTestCases --precondition-arg skip-media-download --log-level-display=DEBUG --screenshot-on-failure --disable-reboot --logcat-on-failure> failed, rc=-15, Command(s) did not complete within 360 seconds
/tmp/cbuildbotv9018V/smoke_suite/test_harness/all/SimpleTestVerify/1_autotest_tests/results-02-cheets_CTS_N.7.1_r6.x86.CtsAccountManagerTestCases/cheets_CTS_N.CtsAccountManagerTestCases                       06/26 02:06:14.340 ERROR|             utils:0280| [stderr] openjdk version "1.8.0_131"




Persist requested.  Use --ssh_port 9228  --ssh_private_key /b/c/cbuild/repository/src/build/images/caroline/latest-cbuildbot/id_rsa  --kvm_pid /tmp/kvm.9228 to re-connect to it.

INFO    : QEMU binary: /b/c/cbuild/repository/chroot/usr/bin/qemu-system-x86_64
INFO    : QEMU version: QEMU emulator version 2.6.0, Copyright (c) 2003-2008 Fabrice Bellard
Stopping the KVM instance
Saving memory snapshot to /b/c/cbuild/repository/chroot/tmp/cbuildbotv9018V/smoke_suite/test_harness/failed/SimpleTestVerify/1_autotest_tests/chromiumos_qemu_mem.bin.KDWpE1...
    freezing VM...
    saving memory, piping through cat...
    flushing disk buffers...
    asking KVM to quit...
    done.

======================================================================
FAIL: SimpleTestVerify (crostestutils.au_test_harness.au_test.AUTest)
Test that only verifies the target image.
----------------------------------------------------------------------

----------------------------------------------------------------------
Ran 1 test in 3539.059s

FAILED (failures=1)
2017/06/26 01:00:44 - cros_build_lib.py - ERROR   : <class 'chromite.lib.parallel.BackgroundFailure'>: Test harness failed. See logs for details.
Traceback (most recent call last):
  File "/b/c/cbuild/repository/chromite/lib/parallel.py", line 441, in _Run
    self._task(*self._task_args, **self._task_kwargs)
  File "/b/c/cbuild/repository/src/platform/crostestutils/au_test_harness/cros_au_test_harness.py", line 77, in run
    raise parallel.BackgroundFailure(msg)
BackgroundFailure: Test harness failed. See logs for details.

2017/06/26 01:00:44 - cros_build_lib.py - ERROR   : /b/c/cbuild/repository/src/platform/crostestutils/au_test_harness/cros_au_test_harness.py --base_image=/b/c/cbuild/repository/src/build/images/caroline/latest-cbuildbot/chromiumos_test_image.bin --target_image=/b/c/cbuild/repository/src/build/images/caroline/latest-cbuildbot/chromiumos_test_image.bin --board=caroline --type=vm --remote=0.0.0.0 --verbose --jobs=1 --ssh_private_key=/b/c/cbuild/repository/src/build/images/caroline/latest-cbuildbot/id_rsa --verify_suite_name=smoke --test_prefix=SimpleTestVerify --test_results_root=/b/c/cbuild/repository/chroot/tmp/cbuildbotv9018V/smoke_suite/test_harness --no_graphics exited with code 1: None
01:00:44: ERROR: 
!!!VMTests failed!!!