[DBAL-1115] Fix quoted identifiers for database creation SQL on SQL Anywhere

[deeky666]

In SQL Anywhere the statements CREATE DATABASE, DROP DATABASE, START DATABASE, STOP DATABASE always take unquoted identifiers.
This PR ensures given identifiers are always passed unquoted to the generated SQL.
This issue was discovered by using DoctrineBundle's database:create and database:drop commands which always quote the database identifiers.

$ php app/console doctrine:database:create
Could not create database for connection named "symfony"
An exception occurred while executing 'START DATABASE '"symfony"' AUTOSTOP OFF':

SQLSTATE [00000] [-82] Angegebene Datenbank konnte nicht gestartet werden: Illegal character in database alias.

[doctrinebot]

Hello,

thank you for creating this pull request. I have automatically opened an issue
on our Jira Bug Tracker for you. See the issue link:

http://www.doctrine-project.org/jira/browse/DBAL-1115

We use Jira to track the state of pull requests and the versions they got
included in.

[Ocramius]

Merged, thanks @deeky666!

master: 8b848ea
2.5: c6eaae5