Tidy up validate-modules:parameter-list-no-elements (batch 1) (#1795) (#1837)

* fixed validation-modules for plugins/modules/storage/netapp/na_ontap_gather_facts.py

* fixed validation-modules for plugins/modules/source_control/gitlab/gitlab_runner.py

* fixed validation-modules for plugins/modules/packaging/os/redhat_subscription.py

* fixed validation-modules for plugins/modules/notification/twilio.py

* fixed validation-modules for plugins/modules/notification/slack.py

* fixed validation-modules for plugins/modules/notification/sendgrid.py

* fixed validation-modules for plugins/modules/notification/rocketchat.py

* fixed validation-modules for plugins/modules/notification/office_365_connector_card.py

* fixed validation-modules for plugins/modules/notification/nexmo.py

* fixed validation-modules for plugins/modules/notification/mail.py

* fixed validation-modules for plugins/modules/net_tools/omapi_host.py

* fixed validation-modules for plugins/modules/net_tools/nsupdate.py

* fixed validation-modules for plugins/modules/net_tools/dnsimple.py

* fixed validation-modules for plugins/modules/monitoring/pagerduty.py

* fixed validation-modules for plugins/modules/monitoring/librato_annotation.py

* fixed validation-modules for plugins/modules/identity/onepassword_info.py

* fixed validation-modules for plugins/modules/identity/keycloak/keycloak_client.py

* fixed validation-modules for plugins/modules/files/xml.py

* fixed validation-modules for plugins/modules/cloud/softlayer/sl_vm.py

* fixed validation-modules for plugins/modules/cloud/smartos/vmadm.py

* fixed validation-modules for plugins/modules/cloud/pubnub/pubnub_blocks.py

* fixed validation-modules for plugins/modules/cloud/packet/packet_device.py

* fixed validation-modules for plugins/modules/cloud/lxd/lxd_container.py

* fixed validation-modules for plugins/module_utils/oracle/oci_utils.py

* fixed validation-modules for plugins/doc_fragments/oracle_creatable_resource.py

* Tidy up validate-modules:parameter-list-no-elements for some modules

* fixed validation-modules for plugins/modules/monitoring/statusio_maintenance.py

* Fixed pending issues from CI validation

* Fixed xml module elements for add_children & set_children

* added changelog fragment

* typo

* fix wording in changelog frag

(cherry picked from commit f33323ca89)

Co-authored-by: Alexei Znamensky <103110+russoz@users.noreply.github.com>

plugins/modules/notification/mail.py

@@ -39,6 +39,7 @@ options:
     - The email-address(es) the mail is being sent to.
     - This is a list, which may contain address and phrase portions.
     type: list
+    elements: str
     default: root
     aliases: [ recipients ]
   cc:
@@ -46,11 +47,13 @@ options:
     - The email-address(es) the mail is being copied to.
     - This is a list, which may contain address and phrase portions.
     type: list
+    elements: str
   bcc:
     description:
     - The email-address(es) the mail is being 'blind' copied to.
     - This is a list, which may contain address and phrase portions.
     type: list
+    elements: str
   subject:
     description:
     - The subject of the email being sent.
@@ -85,12 +88,14 @@ options:
     - A list of pathnames of files to attach to the message.
     - Attached files will have their content-type set to C(application/octet-stream).
     type: list
+    elements: path
     default: []
   headers:
     description:
     - A list of headers which should be added to the message.
     - Each individual header is specified as C(header=value) (see example below).
     type: list
+    elements: str
     default: []
   charset:
     description:
@@ -211,13 +216,13 @@ def main():
             host=dict(type='str', default='localhost'),
             port=dict(type='int', default=25),
             sender=dict(type='str', default='root', aliases=['from']),
-            to=dict(type='list', default=['root'], aliases=['recipients']),
-            cc=dict(type='list', default=[]),
-            bcc=dict(type='list', default=[]),
+            to=dict(type='list', elements='str', default=['root'], aliases=['recipients']),
+            cc=dict(type='list', elements='str', default=[]),
+            bcc=dict(type='list', elements='str', default=[]),
             subject=dict(type='str', required=True, aliases=['msg']),
             body=dict(type='str'),
-            attach=dict(type='list', default=[]),
-            headers=dict(type='list', default=[]),
+            attach=dict(type='list', elements='path', default=[]),
+            headers=dict(type='list', elements='str', default=[]),
             charset=dict(type='str', default='utf-8'),
             subtype=dict(type='str', default='plain', choices=['html', 'plain']),
             secure=dict(type='str', default='try', choices=['always', 'never', 'starttls', 'try']),