network_WiFi_RoamSuspendEndToEnd has been consistently failing with  "Unhandled error: [Errno 111] Connection refused".

https://stainless.corp.google.com/search?exclude_retried=true&first_date=2018-05-12&master_builder_name=&builder_name_number=&shard=&exclude_acts=true&builder_name=&master_builder_name_number=&owner=%5Echromeos%5C-test%24&retry=&exclude_cts=true&exclude_non_production=false&hostname=&board=&test=%5Enetwork_WiFi_RoamSuspendEndToEnd%24&exclude_not_run=false&build=&status=FAIL&status=ERROR&status=ABORT&reason=&waterfall=&suite=wifi_endtoend&last_date=2018-05-18&exclude_non_release=true&exclude_au=true&model=&view=list