Add log_retention field for new_service.php, it seems a must from ISPConfig 3.1.3

new_service.php

@@ -401,6 +401,7 @@ class page_action extends tform_actions {
 			'allow_override' => $template['allow_override'],
 			'http_port' => $template['http_port'],
 			'https_port' => $template['https_port'],
+			'log_retention' => $template['log_retention'],
 			'apache_directives' => $template['apache_directives'],
 			'nginx_directives' => $template['nginx_directives'],
 			'php_fpm_use_socket' => $template['php_fpm_use_socket'],