gitlab_group => Make most options optional (#6712)

* Make most options optional as they should be

* Add filter to create_group instead

* Remove whitespace

* Add changelog fragment

* Added description and extension to fragment

* Update changelogs/fragments/6712-gitlab_group-filtered-for-none-values.yml

Co-authored-by: Felix Fontein <felix@fontein.de>

* Update plugins/modules/gitlab_group.py

Co-authored-by: Felix Fontein <felix@fontein.de>

* Make Python 2.6 compatible.

* Another shot at compatibility.

---------

Co-authored-by: Felix Fontein <felix@fontein.de>

changelogs/fragments/6712-gitlab_group-filtered-for-none-values.yml

@@ -0,0 +1,2 @@
+bugfixes:
+  - gitlab_group - the module passed parameters to the API call even when not set. The module is now filtering out ``None`` values to remediate this (https://github.com/ansible-collections/community.general/pull/6712).

plugins/modules/gitlab_group.py

@@ -255,7 +255,10 @@ class GitLabGroup(object):
             return True
 
         try:
-            group = self._gitlab.groups.create(arguments)
+            # Filter out None values
+            filtered = dict((arg_key, arg_value) for arg_key, arg_value in arguments.items() if arg_value is not None)
+
+            group = self._gitlab.groups.create(filtered)
         except (gitlab.exceptions.GitlabCreateError) as e:
             self._module.fail_json(msg="Failed to create group: %s " % to_native(e))