feature #640 rm dependency on doctrine/persistence (dmaicher)
feature #640 rm dependency on doctrine/persistence (dmaicher)

This PR was merged into the 5.4.x-dev branch.

Discussion
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rm dependency on doctrine/persistence

See https://github.com/symfony/symfony/issues/33164

- make `doctrine/persistence` optional since it will be required transitively anyway via the ORM/ODM that is required for using `DoctrineParamConverter`

Commits
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80e03da rm dependency on doctrine/persistence

sensiolabs/SensioFrameworkExtraBundle