supportsSchemas() was already added (see last commit).
So changed expectation from 1 to any.

Added the supportsSchemas method in the mock because it's being used now.

Apperently the doModifyLimitQuery function does not only cover SQL
generated by ORM (Makes sense to use DBAL as seperate component). Therefor
it can happen that a column name does not include the table and so the old
logic was valid anyway. (line 867-869)

Fixed the unit tests to use real column names instead of aliases.

default schema name is public for postgresql not default. Added debug
statements to test travis-CI.

and takes inspiration from this PR https://github.com/doctrine/dbal/pull/374 which was written for this bug http://www.doctrine-project.org/jira/browse/DDC-2622

Added regression test for the Portability Wrapper when setting the defaultFetchMode on the Connection instead of the Statement

Added support of  maps a Doctrine datetimetz type to a MS SQL SERVER type datetimeoffset(6)

Introduced BC break with databases that switch from case-insensitive
to case-senstive handling when identifier quoting is enabled.

This reverts commit 11111bd7.

Quoting table name to avoid errors with:
SELECT * FROM order;

Demonstrates that NULL parameters are handled incorrectly by the sql parser utils as of 2.3.4