Update session token tests to match current node behavior, fixes #600

Signed-off-by: Evgeniy Zayats <zayatsevgeniy@nspcc.io>

Author: Evgeniy Zayats

pytest_tests/testsuites/session_token/test_static_object_session_token.py

@@ -390,7 +390,7 @@ def test_static_session_signed_by_other(
             temp_directory,
         )
         signed_token_file = sign_session_token(self.shell, session_token_file, stranger_wallet)
-        with pytest.raises(Exception, match=OBJECT_ACCESS_DENIED):
+        with pytest.raises(Exception, match=MALFORMED_REQUEST):
             head_object(
                 user_wallet.path,
                 storage_object.cid,
@@ -680,7 +680,7 @@ def test_static_session_put_verb(
             f"Put verb should be restricted for static session for {request.node.callspec.id}"
         )
         storage_object = storage_objects[0]
-        with pytest.raises(Exception, match=OBJECT_ACCESS_DENIED):
+        with pytest.raises(Exception, match=MALFORMED_REQUEST):
             put_object_to_random_node(
                 user_wallet.path,
                 storage_object.file_path,