test_onroad: handle spotty gps in testing closet (#28194)

selfdrive/test/test_onroad.py

@@ -162,6 +162,10 @@ class TestOnroad(unittest.TestCase):
       if s in ('initData', 'sentinel'):
         continue
       
+      # skip gps services for now
+      if s in ('ubloxGnss', 'ubloxRaw', 'gnssMeasurements'):
+        continue
+        
       with self.subTest(service=s):
         assert len(msgs) >= math.floor(service_list[s].frequency*55)