HV-1970 Add Korean specific RRN annotation

[ing9990]

Jira-(HV-1970)

Hai I tried to add Korean specific @rrn annotation.
I added annotation, validator, testcases, messages, etc.

[marko-bekhta]

Thanks for your pull request.

This post on adding new constraints may be interesting to you, if you haven't seen it before: https://in.relation.to/2018/01/04/adding-new-constraint-to-engine/ . See the annotation processor and documentation steps in particular.
Also, maybe you could update the ValidationMessages_ko.properties file with the new message as well?

[hibernate-github-bot]

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[marko-bekhta]

Nice progress! I've added a few comments inline.

[marko-bekhta]

Hey,

Thanks for your work! I think we are nearly there. There are a few inline comments, mostly about the style to align things with the existing code. And also, we'd want to add this new constraint to the documentation here:

hibernate-validator/documentation/src/main/asciidoc/ch02.asciidoc

Lines 759 to 760 in 729cd01

	`@NIP`:: Checks that the annotated character sequence represents a Polish VAT identification number (https://pl.wikipedia.org/wiki/NIP[NIP])