disable test_multiprocess_dataloader_static for random fail in Py35 CI. test=develop (#25265)

python/paddle/fluid/tests/unittests/test_multiprocess_dataloader_static.py

@@ -157,6 +157,10 @@ class TestStaticDataLoader(unittest.TestCase):
         return ret
 
     def test_main(self):
+        # FIXME(dkp): disable for random fail in Py35 cloud, 
+        #             should be fixed ASAP
+        if sys.version[:3] == '3.5':
+            return
         for p in prepare_places(True):
             results = []
             for num_workers in [0, 2]: