Temporarily skip add_noise for IPNDMScheduler.

Until #990 is addressed.

Author: pcuenca

tests/test_scheduler.py

@@ -261,6 +261,9 @@ def test_scheduler_public_api(self):
 
     def test_add_noise_device(self):
         for scheduler_class in self.scheduler_classes:
+            if scheduler_class == IPNDMScheduler:
+                # Skip until #990 is addressed
+                continue
             scheduler_config = self.get_scheduler_config()
             scheduler = scheduler_class(**scheduler_config)