Make method signature compatible with DBAL 2 and 3
Make method signature compatible with DBAL 2 and 3

In DBAL 2 [1], the signature is
> public function getSchemaManager(Connection $conn);

In DBAL 3 [2], there is a new argument
> public function getSchemaManager(Connection $conn, AbstractPlatform $platform);

[1] https://github.com/doctrine/dbal/blob/787c1411233f0fd403565bdb9708d664ced70fe1/lib/Doctrine/DBAL/Driver.php#L42
[2] https://github.com/doctrine/dbal/blob/7a5da364badc91edac7022d6e1249c73fd917be3/src/Driver.php#L42

doctrine/DoctrineBundle