This PR introduces a new PingableConnection interface and exposes
a ping method on \Doctrine\DBAL\Connection. For drivers where no
ping is supported, a \Doctrine\DBAL\ConnectionException is thrown.

Add SAP Sybase SQL Anywhere database vendor

[DBAL-367] Add missing Oracle binary_float and binary_double type mappings

Fix WriteTest for platforms supporting both sequences and identity columns

Fix WriteTest DateTime assertion for different platform formats

[DBAL-81] Add possibility to set the auto-commit mode for a connection