Fix PropertyAccessorBuilder usage
bug #4300 [Components][PropertyAccess] Fix PropertyAccessorBuilder usage (Thierry Geindre)

This PR was merged into the 2.3 branch.

Discussion
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[Components][PropertyAccess] Fix PropertyAccessorBuilder usage

| Q             | A
| ------------- | ---
| Doc fix?      | yes
| New docs?     | no
| Applies to    | 2.3, 2.4, 2.5
| Fixed tickets |

See https://github.com/symfony/PropertyAccess/blob/2.3/PropertyAccess.php

`getPropertyAccessorBuilder` does not exist. But the right fix might be to add the missing method.

Commits
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c0167da Fix PropertyAccessorBuilder usage