Fix license headers in tests

Some tests added after license cleanup still have bad license header.
Change it to the proper one.

Signed-off-by: Robert Baldyga <robert.baldyga@intel.com>

test/functional/tests/io_class/test_io_class_preserve_config.py

@@ -1,6 +1,6 @@
 #
 # Copyright(c) 2022 Intel Corporation
-# SPDX-License-Identifier: BSD-3-Clause-Clear
+# SPDX-License-Identifier: BSD-3-Clause
 #
 
 import pytest

test/functional/tests/io_class/test_io_class_service_support.py

@@ -1,6 +1,6 @@
 #
 # Copyright(c) 2022 Intel Corporation
-# SPDX-License-Identifier: BSD-3-Clause-Clear
+# SPDX-License-Identifier: BSD-3-Clause
 #
 
 import os

test/functional/tests/lazy_writes/cleaning_policy/test_cleaning_params.py

@@ -1,6 +1,6 @@
 #
-# Copyright(c) 2019-2021 Intel Corporation
-# SPDX-License-Identifier: BSD-3-Clause-Clear
+# Copyright(c) 2019-2022 Intel Corporation
+# SPDX-License-Identifier: BSD-3-Clause
 #
 
 import time

test/functional/tests/stress/test_stress_change_io_class_config_io.py

@@ -1,6 +1,6 @@
 #
 # Copyright(c) 2022 Intel Corporation
-# SPDX-License-Identifier: BSD-3-Clause-Clear
+# SPDX-License-Identifier: BSD-3-Clause
 #
 
 import os