combine migrations 5.5.23 and 5.5.23.1, fixes #4981

Closes #4981

Merge request studip/studip!3739

db/migrations/5.5.23.1_change_collation_for_wiki_tables_user_id.php

-<?php
-final class ChangeCollationForWikiTablesUserId extends Migration
-{
-    protected function up()
-    {
-        $query = "ALTER TABLE `wiki_versions`
-                  CHANGE COLUMN `user_id` `user_id` CHAR(32) COLLATE `latin1_bin` NOT NULL";
-        DBManager::get()->exec($query);
-
-        $query = "ALTER TABLE `wiki_pages`
-                  CHANGE COLUMN `user_id` `user_id` CHAR(32) COLLATE `latin1_bin` NOT NULL";
-        DBManager::get()->exec($query);
-    }
-
-    protected function down()
-    {
-        $query = "ALTER TABLE `wiki_versions`
-                  CHANGE COLUMN `user_id` `user_id` CHAR(32) NOT NULL";
-        DBManager::get()->exec($query);
-
-        $query = "ALTER TABLE `wiki_pages`
-                  CHANGE COLUMN `user_id` `user_id` CHAR(32) NOT NULL";
-        DBManager::get()->exec($query);
-    }
-}

db/migrations/5.5.23_modernize_wiki.php

@@ -19,7 +19,7 @@ final class ModernizeWiki extends Migration
                 `parent_id` int(11) DEFAULT NULL,
                 `read_permission` varchar(32) CHARACTER SET latin1 COLLATE latin1_bin NOT NULL DEFAULT 'all',
                 `write_permission` varchar(32) CHARACTER SET latin1 COLLATE latin1_bin NOT NULL DEFAULT 'all',
-                `user_id` char(32) NOT NULL,
+                `user_id` char(32) COLLATE `latin1_bin` NOT NULL,
                 `locked_since` bigint(20) DEFAULT NULL,
                 `locked_by_user_id` char(32) CHARACTER SET latin1 COLLATE latin1_bin DEFAULT NULL,
                 `chdate` bigint(20) NOT NULL,
@@ -36,7 +36,7 @@ final class ModernizeWiki extends Migration
                 `page_id` int(11) unsigned NOT NULL,
                 `name` varchar(128) NOT NULL,
                 `content` text DEFAULT NULL,
-                `user_id` char(32) NOT NULL,
+                `user_id` char(32) COLLATE `latin1_bin` NOT NULL,
                 `mkdate` bigint(20) NOT NULL,
                 PRIMARY KEY (`version_id`),
                 KEY `page_id` (`page_id`),