Serialized column should not be wrapped twice. Fix #10067.

[kennyj]

See #10067

If AR's instance has serialized attribute ( or timezone aware attribute), instance level @columns_hash is wrapped multiple times during instantiate in current implementation.

[rafaelfranca]

@kennyj could you add a CHANGELOG entry with a description of the problem?

[rafaelfranca]

Also I think we should call the dup inside the instantiate metod like was did at #10067 (methods should not mutate their arguments)

[kennyj]

ok. just a moment.

[mdespuits]

Looks like there are some dupicate commits from master.

[kennyj]

@mattdbridges thanks for reporting. I've update this PR aginn. Is this ok ?
@rafaelfranca I've update this PR.

[mdespuits]

@kennyj Looks like 2461deb4 is the only one still dangling. Can you squash your commits?

[kennyj]

I've updated again.
@mattdbridges I'm afraid that disappearing @derikson 's contribution. so I've squashed my commits only.

[mdespuits]

@kennyj Gotcha. Looks good to me