boards: simulator: Enable TestApp by default

Relaunching the simulator to run tests quickly gets frustrating if
the Self Test is disabled by default. Change this.

Signed-off-by: Daniel Thompson <daniel@redfelineninja.org.uk>

wasp/boards/simulator/main.py

@@ -3,6 +3,10 @@
 
 import wasp
 
+# Test app is used a lot on the simulator. Let's make sure it is
+# registered by default.
+wasp.system.register('apps.testapp.TestApp')
+
 # Ensure there's something interesting to look at ;-)
 wasp.system.set_music_info({
         'track': 'Tasteless Brass Duck',