-- In environment where there are too many APs, sometimes, the AP will not show in the scan list.
Part of the reason is due to the change that the scanning on each frequency is shortened to save power.
to avoid that, change the test to connect without scanning.
-- Increase the timer to wait for WiFi to be connected
Change-Id: If1a72607b3c7ad13dbbf788607665986eaf5b6b3
f2991add02