Fix JsonAlias with unwrapped lists

[westinrm]

WrapperHandlingDeserializer does not add aliases for unwrapped properties to the set of unwrapped names,
causing deserialization of unwrapped lists using aliases to fail.

This has the slightly strange behavior that if you mix aliases you'll end up with the latter sequence.
Ex <val>1</val><alias>2</alias> will deserialize to [2] instead of [1,2]

[cowtowncoder]

First of all, thank you for contributing this fix & test that verifies it. I'd be happy to merge this in.

Just one quick clerical thing: if I haven't asked for and received CLA earlier (I don't think so but I have let me know and I'll dig more), I'd need one:

https://github.com/FasterXML/jackson/blob/master/contributor-agreement.pdf

before committing the patch. Only needs to be done once and is good for any number of contributions.
The common way is to print CLA doc, fill & sign, scan/photo, email to info at fasterxml dot com. Once I receive it, I'll merge this into 2.11 branch (seems like a safe enough fix so that makes sense as target).

Looking forward to merging this, thank you again!

[westinrm]

Sorry for the long delay here -- I've sent a CLA to info at fasterxml dot com that should cover any contributions by me.

[cowtowncoder]

@westinrm Np. I don't yet see it.. but will keep checking, might be just delay.

[westinrm]

It was sent on Friday, Mar 19th around 11pm GMT.

[cowtowncoder]

uff. Of course it went to "spam" for some reason. Ok, mystery solved.

[cowtowncoder]

Thank you again! Merged in 2.11 branch, but most likely to be available in 2.12.3 next (2.11 may or may not get another minor version release; if one is done it'll be 2.11.5)