autotest: Set servo_type when init servo host.

This changes temporally till we upload deploy script and fill al missed servo_types in inventory.

BUG=chromium:1071524
TEST=run local

./server/autoserv -s --host-info-subdir host_info_store -m chromeos4-row9-rack8-host21  --lab True --local-only-host-info True -R -r /usr/local/google/home/otabek/test_result/

Change-Id: I1a85a5ee3df289d7986641368cc821a57b9b780b
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/third_party/autotest/+/2182035
Commit-Queue: Otabek Kasimov <[email protected]>
Tested-by: Otabek Kasimov <[email protected]>
Reviewed-by: Garry Wang <[email protected]>
diff --git a/server/hosts/cros_host_unittest.py b/server/hosts/cros_host_unittest.py
index cb7b1b5..924548d 100755
--- a/server/hosts/cros_host_unittest.py
+++ b/server/hosts/cros_host_unittest.py
@@ -125,7 +125,9 @@
         host = MockHost()
         host.servo = None
         host._servo_host = mock.Mock()
-        host._servo_host.get_servo.return_value = 'Not Empty'
+        servo = mock.Mock()
+        servo.get_servo_type.return_value = None
+        host._servo_host.get_servo.return_value = servo
         host._servo_host.get_servo_state.return_value = 'SOME_STATE'
         host.host_info_store = host_info.InMemoryHostInfoStore()
         return host
@@ -169,7 +171,9 @@
     def test_set_servo_host_update_servo_state_when_host_exist(self):
         host = self.create_host()
         host._servo_host = mock.Mock()
-        host._servo_host.get_servo.return_value = 'Not Empty'
+        servo = mock.Mock()
+        servo.get_servo_type.return_value = None
+        host._servo_host.get_servo.return_value = servo
         host._servo_host.get_servo_state.return_value = 'SOME_STATE'
         self.assertEqual(host.host_info_store.get().get_label_value(SERVO_STATE_PREFIX), '')
 
@@ -190,7 +194,9 @@
     def test_set_servo_host_use_servo_state_from_host_when_host_is_passed(self):
         host = self.create_host()
         servo_host = mock.Mock()
-        servo_host.get_servo.return_value = 'Not Empty'
+        servo = mock.Mock()
+        servo.get_servo_type.return_value = None
+        servo_host.get_servo.return_value = servo
         servo_host.get_servo_state.return_value = 'state_of_host'
 
         host.set_servo_host(servo_host)