autotest (wifi): improve reliability of LinuxRouter.start_hostapd()

When checking if hostapd has started, we were looking for
'Completing interface initialization'. Unfortunately, some errors
occur even after that point.

To avoid missing those errors, this CL looks for 'Setup of interface
done', before concluding that hostapd has started.

BUG=chromium:505958
TEST=network_WiFi_SimpleConnect.wifi_check11g
TEST=network_WiFi_SimpleConnect.wifi_checkWPA2_CCMP_PMF
pre-cq-configs: wificell-pre-cq

Change-Id: I07ddaf68c25129a958b479abd3cc45e607ed56e2
Reviewed-on: https://chromium-review.googlesource.com/282783
Reviewed-by: Paul Stewart <pstew@chromium.org>
Trybot-Ready: mukesh agrawal <quiche@chromium.org>
Tested-by: mukesh agrawal <quiche@chromium.org>
Reviewed-by: Christopher Wiley <wiley@chromium.org>
Commit-Queue: mukesh agrawal <quiche@chromium.org>
1 file changed