Stop() will now return NotFound if DPP is not running. This causes
the DPP test to fail since it calls this regardless if the protocol
already stopped. Ignore this exception since tests end in various
states, some stopped and some not.
Similarly to ofono/phonesim allow tests to be skipped if wpa_supplicant
is not found on the system.
This required some changes to DPP/P2P where Wpas() should be called first
since this can now throw a SkipTest exception.
The Wpas class was also made to allow __del__ to be called without
throwing additional exceptions in case wpa_supplicant was not found.
When configuring wpa_supplicant all we care about is that it
received the configuration object. wpa_supplicant takes quite a bit
of time to connect in some cases so waiting for that is unneeded.
This also increases the DPP timeout which may be required on slower
systems or if the timing is particularly unlucky when receiving
frames.
First disconnect wpa_supplicant to make sure it wont miss frames if
it decides to connect. Also alter the order of things for the
configurator test so autoconnect doesn't start until after hostapd
is up (avoids additional scanning and delays)
