tests: Fix EAPOL frame source address in protocol tests

tests: Fix EAPOL frame source address in protocol tests

The send_eapol() calls for delivering frames to wpa_supplicant had a
copy-paste bug from the earlier hostapd cases. These were supposed to
use the BSSID, not the address of the station, as the source address.
The local address worked for most cases since it was practically
ignored, but this could prevent the race condition workaround for
association event from working. Fix this by using the correct source
address (BSSID).

Signed-off-by: Jouni Malinen <jouni@qca.qualcomm.com>