zabbix_maintenance: prevent to log password

lib/ansible/modules/extras/monitoring/zabbix_maintenance.py

@@ -48,12 +48,10 @@ options:
         description:
             - Zabbix user name.
         required: true
-        default: null
     login_password:
         description:
             - Zabbix user password.
         required: true
-        default: null
     host_names:
         description:
             - Hosts to manage maintenance window for.
@@ -83,7 +81,6 @@ options:
         description:
             - Unique name of maintenance window.
         required: true
-        default: null
     desc:
         description:
             - Short description of maintenance window.
@@ -273,9 +270,9 @@ def main():
             host_names=dict(type='list', required=False, default=None, aliases=['host_name']),
             minutes=dict(type='int', required=False, default=10),
             host_groups=dict(type='list', required=False, default=None, aliases=['host_group']),
-            login_user=dict(required=True, default=None),
-            login_password=dict(required=True, default=None),
-            name=dict(required=True, default=None),
+            login_user=dict(required=True),
+            login_password=dict(required=True, no_log=True),
+            name=dict(required=True),
             desc=dict(required=False, default="Created by Ansible"),
             collect_data=dict(type='bool', required=False, default=True),
         ),