enh(database): add index in ws_token table to improve performance (#6107)

Refs: #6056

www/install/createTables.sql

@@ -2291,6 +2291,7 @@ CREATE TABLE ws_token (
   token VARCHAR(100) NOT NULL,
   generate_date DATETIME NOT NULL,
   UNIQUE (token),
+  KEY `index1` (`generate_date`),
   FOREIGN KEY (contact_id) REFERENCES contact (contact_id) ON DELETE CASCADE
 ) ENGINE=InnoDB DEFAULT CHARSET=utf8;
 

www/install/sql/centreon/Update-DB-2.8.18_to_2.8.19.sql

 -- Change version of Centreon
 UPDATE `informations` SET `value` = '2.8.19' WHERE CONVERT( `informations`.`key` USING utf8 ) = 'version' AND CONVERT ( `informations`.`value` USING utf8 ) = '2.8.18' LIMIT 1;
+
+-- Add index to ws_token
+ALTER TABLE `ws_token` ADD INDEX `index1` (`generate_date`);
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