[PR #5808/6ec04973 backport][stable-5] xml children module parameter does not exist (#5838)

xml children module parameter does not exist (#5808)

* Add changelog

* Add integration tests

* Rename children to set_children

* Add PR information

* Update changelogs/fragments/5808-xml-children-parameter-does-not-exist.yml

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

Co-authored-by: Felix Fontein <felix@fontein.de>
(cherry picked from commit 6ec049734e)

Co-authored-by: Cédric Servais <cedric.servais@outlook.com>

plugins/modules/files/xml.py

@@ -266,7 +266,7 @@ EXAMPLES = r'''
   community.general.xml:
     path: /foo/bar.xml
     xpath: /business/website
-    children: []
+    set_children: []
 
 # In case of namespaces, like in below XML, they have to be explicitly stated.
 #
@@ -961,7 +961,7 @@ def main():
     # add_children && set_children both set?: should have already aborted by now
 
     # set_children set?
-    if set_children:
+    if set_children is not None:
         set_target_children(module, doc, xpath, namespaces, set_children, input_type)
 
     # add_children set?