Remove as maintainer (#11911)

Remove ownership

I do not maintain those modules anymore since years. I think the time
has come to remove at least my name from them.

plugins/modules/udm_dns_record.py

@@ -1,7 +1,7 @@
 #!/usr/bin/python
 
 # Copyright (c) 2016, Adfinis SyGroup AG
-# Tobias Rueetschi <tobias.ruetschi@adfinis-sygroup.ch>
+# @keachi
 # 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
 
@@ -10,7 +10,7 @@ from __future__ import annotations
 DOCUMENTATION = r"""
 module: udm_dns_record
 author:
-  - Tobias Rüetschi (@keachi)
+  - keachi (@keachi)
 short_description: Manage DNS entries on a univention corporate server
 description:
   - This module allows to manage DNS records on a univention corporate server (UCS). It uses the Python API of the UCS to

plugins/modules/udm_dns_zone.py

@@ -1,7 +1,7 @@
 #!/usr/bin/python
 
 # Copyright (c) 2016, Adfinis SyGroup AG
-# Tobias Rueetschi <tobias.ruetschi@adfinis-sygroup.ch>
+# @keachi
 # 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
 
@@ -10,7 +10,7 @@ from __future__ import annotations
 DOCUMENTATION = r"""
 module: udm_dns_zone
 author:
-  - Tobias Rüetschi (@keachi)
+  - keachi (@keachi)
 short_description: Manage DNS zones on a univention corporate server
 description:
   - This module allows to manage DNS zones on a univention corporate server (UCS). It uses the Python API of the UCS to create

plugins/modules/udm_group.py

@@ -1,7 +1,7 @@
 #!/usr/bin/python
 
 # Copyright (c) 2016, Adfinis SyGroup AG
-# Tobias Rueetschi <tobias.ruetschi@adfinis-sygroup.ch>
+# @keachi
 # 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
 
@@ -10,7 +10,7 @@ from __future__ import annotations
 DOCUMENTATION = r"""
 module: udm_group
 author:
-  - Tobias Rüetschi (@keachi)
+  - keachi (@keachi)
 short_description: Manage of the posix group
 description:
   - This module allows to manage user groups on a univention corporate server (UCS). It uses the Python API of the UCS to

plugins/modules/udm_share.py

@@ -1,7 +1,7 @@
 #!/usr/bin/python
 
 # Copyright (c) 2016, Adfinis SyGroup AG
-# Tobias Rueetschi <tobias.ruetschi@adfinis-sygroup.ch>
+# @keachi
 # 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
 
@@ -10,7 +10,7 @@ from __future__ import annotations
 DOCUMENTATION = r"""
 module: udm_share
 author:
-  - Tobias Rüetschi (@keachi)
+  - keachi (@keachi)
 short_description: Manage samba shares on a univention corporate server
 description:
   - This module allows to manage samba shares on a univention corporate server (UCS). It uses the Python API of the UCS to

plugins/modules/udm_user.py

@@ -1,7 +1,7 @@
 #!/usr/bin/python
 
 # Copyright (c) 2016, Adfinis SyGroup AG
-# Tobias Rueetschi <tobias.ruetschi@adfinis-sygroup.ch>
+# @keachi
 # 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
 
@@ -10,7 +10,7 @@ from __future__ import annotations
 DOCUMENTATION = r"""
 module: udm_user
 author:
-  - Tobias Rüetschi (@keachi)
+  - keachi (@keachi)
 short_description: Manage posix users on a univention corporate server
 description:
   - This module allows to manage posix users on a univention corporate server (UCS). It uses the Python API of the UCS to