[PATCH rdma-core] tests/test_mr.py: make cases description unique

["lizhijian@xxxxxxxxxxx" <lizhijian@xxxxxxxxxxx>]

[root@rdma-server rdma-core]# git grep 'Verify that illegal flags combination fails as expected'
tests/test_mr.py:        Verify that illegal flags combination fails as expected
tests/test_mr.py:        Verify that illegal flags combination fails as expected

This description will be printed if verbose is on.

I'm going to add pyverbs tests to the LKP CI, unique description can help
LKP to distinguish the case.

Signed-off-by: Li Zhijian <lizhijian@xxxxxxxxxxx>
---
 tests/test_mr.py | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/tests/test_mr.py b/tests/test_mr.py
index 3ec1fb3f32e8..b8159e4ca504 100644
--- a/tests/test_mr.py
+++ b/tests/test_mr.py
@@ -529,7 +529,7 @@ class DmaBufMRTest(PyverbsAPITestCase):
 
     def test_dmabuf_reg_mr_bad_flags(self):
         """
-        Verify that illegal flags combination fails as expected
+        Verify that DmaBufMR with illegal flags combination fails as expected
         """
         check_dmabuf_support(self.gpu)
         with PD(self.ctx) as pd:
-- 
2.31.1