Tests. Expect failure in test_validate_target_lsn, because it requires multi-timeline WAL validation, which is not implemented yet

Author: alubennikova

tests/validate.py

@@ -3451,7 +3451,8 @@ def test_validate_corrupt_tablespace_map(self):
         # Clean after yourself
         self.del_test_dir(module_name, fname)
 
-    # @unittest.expectedFailure
+    #TODO fix the test
+    @unittest.expectedFailure
     # @unittest.skip("skip")
     def test_validate_target_lsn(self):
         """