Use SPDX identifiers everywhere

https://gerrit.openbmc.org/c/openbmc/bmcweb/+/74513 moved most places
over to SPDX but forgot a few, fix the ones found with grep.

SPDX identifiers are simpler, and reduce the amount of cruft we have in
code files.  They are recommended by linux foundation, and therefore we
should do as they allow.

This patchset does not intend to modify any intent on any existing
copyrights or licenses, only to standardize their inclusion.

[1] https://www.linuxfoundation.org/blog/blog/copyright-notices-in-open-source-software-projects

Change-Id: Ie4c2ea53f7bc8d902bf87fef6df2a67c6b1de613
Signed-off-by: Gunnar Mills <gmills@us.ibm.com>
diff --git a/redfish-core/include/event_logs_object_type.hpp b/redfish-core/include/event_logs_object_type.hpp
index e97e551..32f1b86 100644
--- a/redfish-core/include/event_logs_object_type.hpp
+++ b/redfish-core/include/event_logs_object_type.hpp
@@ -1,16 +1,8 @@
-/*
-Copyright (c) 2020 Intel Corporation
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-      http://www.apache.org/licenses/LICENSE-2.0
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
+// SPDX-License-Identifier: Apache-2.0
+// SPDX-FileCopyrightText: Copyright OpenBMC Authors
+// SPDX-FileCopyrightText: Copyright 2020 Intel Corporation
 #pragma once
+
 #include <string>
 #include <vector>
 namespace redfish
diff --git a/redfish-core/include/subscription.hpp b/redfish-core/include/subscription.hpp
index 704d07a..2a3d73d 100644
--- a/redfish-core/include/subscription.hpp
+++ b/redfish-core/include/subscription.hpp
@@ -1,19 +1,8 @@
-/*
-Copyright (c) 2020 Intel Corporation
-
-Licensed under the Apache License, Version 2.0 (the "License");
-you may not use this file except in compliance with the License.
-You may obtain a copy of the License at
-
-      http://www.apache.org/licenses/LICENSE-2.0
-
-Unless required by applicable law or agreed to in writing, software
-distributed under the License is distributed on an "AS IS" BASIS,
-WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-See the License for the specific language governing permissions and
-limitations under the License.
-*/
+// SPDX-License-Identifier: Apache-2.0
+// SPDX-FileCopyrightText: Copyright OpenBMC Authors
+// SPDX-FileCopyrightText: Copyright 2020 Intel Corporation
 #pragma once
+
 #include "event_logs_object_type.hpp"
 #include "event_service_store.hpp"
 #include "filter_expr_parser_ast.hpp"