[CP-914] Update factory reset test

Moved the test out form pytest/service-desktop
Improved test scenario to check for the onboarding screen
Used Factory Reset API for Harness

Author: Marek Niepieklo

test/harness

@@ -0,0 +1,35 @@
+# Copyright (c) 2017-2021, Mudita Sp. z.o.o. All rights reserved.
+# For licensing, see https://github.com/mudita/MuditaOS/LICENSE.md
+import pytest
+import time
+
+from harness import log
+from harness.utils import Timeout
+from harness.interface.defs import status
+from harness.api.factory import FactoryReset
+from harness.rt_harness_discovery import get_harness_automatic
+
+def phone_in_onboarding(harness):
+
+    # assert that we are in ApplicationOnBoarding
+    log.debug("Assert that we are in ApplicationOnBoarding")
+    assert harness.get_application_name() == "ApplicationOnBoarding"
+
+@pytest.mark.rt1051
+@pytest.mark.usefixtures("phone_unlocked")
+def test_factory_reset(harness):
+    ret = FactoryReset().run(harness)
+
+    assert ret.requestDone == True
+
+    try:
+        with Timeout.limit(seconds=30):
+            log.info("Please, power-cycle the DUT")
+            harness.connection.watch_port_reboot(20)
+            harness = get_harness_automatic(20)
+    except Timeout as e:
+        log.error("Factory reset timeout reached")
+
+    time.sleep(5)  # wait for the DUT to be ready
+
+    phone_in_onboarding(harness)