fail comes from here:
https://cros-goldeneye.corp.google.com/chromeos/healthmonitoring/buildDetails?buildbucketId=8926039558690516368

although login_VMSanity seems to be green:
https://stainless.corp.google.com/search?view=matrix&row=model&col=build&first_date=2018-12-21&last_date=2018-12-27&test=login_VMSanity&exclude_cts=false&exclude_not_run=false&exclude_non_release=true&exclude_au=true&exclude_acts=true&exclude_retried=true&exclude_non_production=false

the test seems to be flaky on some boards. and the flakyness started on R73-11466. but in r73-11476 everything seems to be normal again. waiting for next build.

closing it as builds are green again... perhaps it was a flaky in infra.
the last 2 builds seems to be green.