tree d29bed6740e12a12b4b5a90ed236bf5b09cd3a15
parent 4a165582f3a9d425ba1c5fde717b0b76f03dbf3f
author Christopher Wiley <wiley@chromium.org> 1375907723 -0700
committer ChromeBot <chrome-bot@google.com> 1375917252 -0700

shill-test: Fix missing service WiFi test flakes

Fix a class of errors that manifest as:

Unhandled Fault:
<Fault 1: '<class \'dbus.exceptions.DBusException\'>:
org.freedesktop.DBus.Error.UnknownObject:
Method "GetProperties" with signature "" on interface
"org.chromium.flimflam.Service" doesn\'t exist\n'>

This happens when we're enumerating services that are being torn down
in shill.  This can happen when we configure our test AP several
different ways in a short time, giving us more opportunities to
experience this race.

BUG=None
TEST=Ran test_that --fast suite:wifi_matfunc and finally saw these errors
disappear.

Change-Id: If4c3d15922f4d79028d6876b676853e06434c115
Reviewed-on: https://gerrit.chromium.org/gerrit/64990
Tested-by: Christopher Wiley <wiley@chromium.org>
Reviewed-by: Paul Stewart <pstew@chromium.org>
Commit-Queue: Christopher Wiley <wiley@chromium.org>