Add JwtClaimValidator

[zeeshanadnan]

fixes gh-7860

[zeeshanadnan]

Hi @jzheaux feedback on code & implementation improvements is highly appreciated.

[jzheaux]

Thanks for the PR, @zeeshanadnan! I've left some feedback inline.

[zeeshanadnan]

Hi @jzheaux updated the PR with the requested changes. For any further changes let me know.

[jzheaux]

@zeeshanadnan thanks for the edits!

Since JwtClaimValidator is a generalization of JwtIssuerValidator, then JwtIssuerValidator should be able to use it.

As part of this PR, would you please change JwtIssuerValidator to use JwtClaimValidator? I believe that you could do something like:

public JwtIssuerValidator(String issuer) {
    this.validator = new JwtClaimValidator(ISS, iss -> issuer.equals(iss));
}

This will help reinforce the contract being proposed.

[zeeshanadnan]

Hi @jzheaux, updated the PR with requested changes.

[jzheaux]

Thanks, @zeeshanadnan! This is now merged into master via 431cd60.

Also, I updated some related tests in 283e451

[zeeshanadnan]

@jzheaux thanks for the merge & guidance. Sorry for lot of iterations & any inconvenience.

[jzheaux]

My pleasure, @zeeshanadnan. I think I caused some of that churn, too. :)

I hope to see more contributions from you! Thanks, again, for taking the initiative.