Catch exception on tf_session.TF_NewStatus() (#9575)

* Catch exception on tf_session.TF_NewStatus()

"try" and "finally" without "except" is not sufficient to catch the exception.  The exception makes TensorFlow appear to be broken.  Fixes #8652

* Catching an AttributeError instead of broad exception type

tensorflow/python/client/session.py

@@ -594,6 +594,9 @@ class BaseSession(SessionInterface):
       try:
         status = tf_session.TF_NewStatus()
         tf_session.TF_DeleteDeprecatedSession(self._session, status)
+      except AttributeError:
+        # 'NoneType' object has no attribute 'TF_NewStatus'
+        pass
       finally:
         if status is not None:
           tf_session.TF_DeleteStatus(status)