* h/t @stof and @deeky666
 * add two test cases for the general connection test
 * remove the ConnectionException method I added originally

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