This replaces use of the external hwsim_test tool for most data
connectivity test cases. Only the cases where a special interface
(bridge/VLAN) is used are still executed through hwsim_test.
The internal DATA_TEST_* functionality makes it easier to extend the
connectivity test cases through an external device with real WLAN
hardware instead of the hwsim test setup. In addition, the error reports
from this code can be made more informative.
Signed-off-by: Jouni Malinen <j@w1.fi>