auto-t: fix testConnectAutoconnect

There was no open ssid provisioning file, which was fine as the
first test should have created one. But to be safe, include one
explicitly and use the proper setUp/tearDown functions.

autotests/testConnectAutoconnect/open_network_test.py

@@ -24,6 +24,10 @@ class TestOpenNetwork(unittest.TestCase):
         tca.validate('ssidOpen', False)
         tca.validate('ssidOpen', True)
 
+    def setUp(self):
+        IWD.copy_to_storage('ssidOpen.open')
+
+    def tearDown(self):
         IWD.clear_storage()
 
 if __name__ == '__main__':