add $isXsdValidationEnabled to SimplifiedXmlDriver constructor

[dmaicher]

This adds the missing $isXsdValidationEnabled argument to the SimplifiedXmlDriver constructor.

Will enable us to fix this deprecation on DoctrineBundle.

[eisberg]

After this change we get an error:

ibxml error: Element '{http://gediminasm.org/schemas/orm/doctrine-extensions-mapping}timestampable': No matching global element declaration available, but demanded by the strict wildcard.
in src/Resources/config/doctrine/UserGroupRelation.orm.xml at line 21

[ro0NL]

ref #10626

AFAIK it's a doctrine/orm issue, not a bundle one

either way ... please fix :) this was quite a patch release: 2.14.1...2.14.2

[greg0ire]

Yeah quite big lol… we should really release more often. Anyway, as mentioned elsewhere, this is not an ORM issue, it's a bundle one. 2.14.2 merely reveals the latent issue. If you downgrade the bundle to 2.8.x, it will disappear.