Set correct default values for user creation in the backend also in t…

…he sample_learn.sql sample data (#13127)

The default value for the useractivation param is 2
https://github.com/joomla/joomla-cms/blob/3.6.4/administrator/components/com_users/config.xml#L45-L68

installation/sql/mysql/sample_learn.sql

@@ -766,6 +766,6 @@ INSERT IGNORE INTO `#__viewlevels` (`id`, `title`, `ordering`, `rules`) VALUES
 (5, 'Guest', 1, '[13]'),
 (6, 'Super Users', 5, '[8]');
 
-UPDATE `#__extensions` SET `params`='{"allowUserRegistration":"0","new_usertype":"2","guest_usergroup":"13","sendpassword":"1","useractivation":"1","mail_to_admin":"0","captcha":"","frontend_userparams":"1","site_language":"0","change_login_name":"0","reset_count":"10","reset_time":"1","mailSubjectPrefix":"","mailBodySuffix":"","save_history":"1","history_limit":5}' WHERE extension_id=25;
+UPDATE `#__extensions` SET `params`='{"allowUserRegistration":"0","new_usertype":"2","guest_usergroup":"13","sendpassword":"1","useractivation":"2","mail_to_admin":"0","captcha":"","frontend_userparams":"1","site_language":"0","change_login_name":"0","reset_count":"10","reset_time":"1","mailSubjectPrefix":"","mailBodySuffix":"","save_history":"1","history_limit":5}' WHERE extension_id=25;
 
 SET FOREIGN_KEY_CHECKS=1;