Merge pull request #17949 from nextcloud/debt/deprecated-const

Connection::TRANSACTION_READ_COMMITTED is deprecated

diff --cc lib/private/DB/Connection.php
index f9c6f4155a37243ddc562115e9711f387e2891a6,e14323594d4df174629b3907ca282d21d3817e3f..65e1d84bfb1bd8abec577f902b44b6bd7dc48e11
--- 1/lib/private/DB/Connection.php
--- 2/lib/private/DB/Connection.php
+++ b/lib/private/DB/Connection.php
@@@ -30,14 -30,15 +30,15 @@@
  
  namespace OC\DB;
  
 +use Doctrine\Common\EventManager;
 +use Doctrine\DBAL\Cache\QueryCacheProfile;
 +use Doctrine\DBAL\Configuration;
  use Doctrine\DBAL\DBALException;
  use Doctrine\DBAL\Driver;
 -use Doctrine\DBAL\Configuration;
 -use Doctrine\DBAL\Cache\QueryCacheProfile;
 -use Doctrine\Common\EventManager;
 -use Doctrine\DBAL\Platforms\MySqlPlatform;
  use Doctrine\DBAL\Exception\ConstraintViolationException;
 +use Doctrine\DBAL\Platforms\MySqlPlatform;
  use Doctrine\DBAL\Schema\Schema;
+ use Doctrine\DBAL\TransactionIsolationLevel;
  use OC\DB\QueryBuilder\QueryBuilder;
  use OCP\DB\QueryBuilder\IQueryBuilder;
  use OCP\IDBConnection;