Update PersistentCollectionSerializer.java

[Taha-Di-Nero]

fix REPLACE_PERSISTENT_COLLECTIONS in EAGER #146

[pjfanning]

@cowtowncoder I am not a lawyer - but this PR seems to be a direct copy of #146 (issue #140) so this PR should probably not be considered the original work of @Taha-Di-Nero - this makes it problematic to merge this PR since the copyright on the code here is at least debatable.

[cowtowncoder]

We'd also need this for all backends, not just H5 and H6.

As to contribution, this is not a super sizable change so one could argue that one could come up with this on their own (there aren't that many ways to do it).
But yeah, probably was just copied.

Let's hope author of #146 can contribute it, if so this could be just addition to H6.

[Taha-Di-Nero]

@pjfanning @cowtowncoder Yes this is applying the same patch done in #146 but for hibernate 6, the author of #146 is my colleague and I asked him to do what @cowtowncoder requested but he doesn't want to do it.
We need only hibernate 6 and we manage it via a small fork that we would like to remove, so please merge it.
Best regards

[cowtowncoder]

@Taha-Di-Nero Ok as long as author is fine with your contributing the code (you have discussed it), and you are ok sending CLA (which just attests that you think you can contribute the code), I think we can merge it.

But one thing I realize now is that there is no unit test to verify this fix works. I guess you are using a fork so I don't doubt it doesn't, but if there was one way to test it that'd obviously be great.

[Taha-Di-Nero]

@cowtowncoder contributor-agreement.pdf
Hi
Unfortunately we didn't implemented any tests.
Best regards

[cowtowncoder]

Excellent, thank you @Taha-Di-Nero ! Ok, aside from tests (it's ok since you have tested this), could I ask same changes for hibernate5 and hibernate5-jakarta modules? :)

If you don't have time I can do it later on but just in case. I hope to merge this later today -- thank you once again for contributing this. It will make it in 2.16.0.