Bug#4511: QBE fails to generate LEFT join for InnoDB foreign keys in absence of configuration storage.

Signed-off-by: Ashutosh Dhundhara <ashutoshdhundhara@yahoo.com>
Merge pull request #1324 from ashutoshdhundhara/bug_qbe

Bug#4511: QBE fails to generate LEFT join for InnoDB foreign keys in absence of configuration storage.