Add the columns and alter the index in Version1010Date20200630192842

This is to ensure new installations do not need to go through migration
 history.

Signed-off-by: Côme Chilliet <come.chilliet@nextcloud.com>

apps/user_ldap/lib/Migration/Version1010Date20200630192842.php

@@ -60,8 +60,12 @@ class Version1010Date20200630192842 extends SimpleMigrationStep {
 				'length' => 255,
 				'default' => '',
 			]);
+			$table->addColumn('ldap_dn_hash', Types::STRING, [
+				'notnull' => false,
+				'length' => 64,
+			]);
 			$table->setPrimaryKey(['owncloud_name']);
-			$table->addUniqueIndex(['ldap_dn'], 'ldap_dn_users');
+			$table->addUniqueIndex(['ldap_dn_hash'], 'ldap_user_dn_hashes');
 		}
 
 		if (!$schema->hasTable('ldap_group_mapping')) {
@@ -81,8 +85,12 @@ class Version1010Date20200630192842 extends SimpleMigrationStep {
 				'length' => 255,
 				'default' => '',
 			]);
-			$table->setPrimaryKey(['ldap_dn']);
-			$table->addUniqueIndex(['owncloud_name'], 'owncloud_name_groups');
+			$table->addColumn('ldap_dn_hash', Types::STRING, [
+				'notnull' => false,
+				'length' => 64,
+			]);
+			$table->setPrimaryKey(['owncloud_name']);
+			$table->addUniqueIndex(['ldap_dn_hash'], 'ldap_group_dn_hashes');
 		}
 
 		if (!$schema->hasTable('ldap_group_members')) {