Add default license header to files which have no copyright or license header yet (#5074) (#5075)

* Add default license header to files which have no copyright or license header yet.

* yml extension should have been xml...

(cherry picked from commit 1ab2a5f1bc)

tests/integration/targets/ini_file/tasks/tests/00-basic.yml

@@ -1,4 +1,8 @@
 ---
+# Copyright (c) Ansible Project
+# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
+# SPDX-License-Identifier: GPL-3.0-or-later
+
 ## basiscs
 
 - name: test-basic 1 - specify both "value" and "values" and fail

tests/integration/targets/ini_file/tasks/tests/01-value.yml

@@ -1,4 +1,7 @@
 ---
+# Copyright (c) Ansible Project
+# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
+# SPDX-License-Identifier: GPL-3.0-or-later
 
 ## testing value
 

tests/integration/targets/ini_file/tasks/tests/02-values.yml

@@ -1,4 +1,7 @@
 ---
+# Copyright (c) Ansible Project
+# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
+# SPDX-License-Identifier: GPL-3.0-or-later
 
 ## testing values
 

tests/integration/targets/ini_file/tasks/tests/03-encoding.yml

@@ -1,4 +1,7 @@
 ---
+# Copyright (c) Ansible Project
+# GNU General Public License v3.0+ (see LICENSES/GPL-3.0-or-later.txt or https://www.gnu.org/licenses/gpl-3.0.txt)
+# SPDX-License-Identifier: GPL-3.0-or-later
 
 # Regression test for https://github.com/ansible-collections/community.general/pull/2578#issuecomment-868092282
 - name: Create UTF-8 test file