[Feature] Add to RU generators for INN and SNILS for Person

[pwsdotru]

There is INN (Tax Payer Number) generator for Company.

Company have 10 digits in INN. For persons using numbers with 12 digits. And this number have checksum too.

So All Persons in Russia have SNILS (like Social Security Number in USA and etc.).
SNILS have format like XXX-XXX-XXX YY where X are digits of number and YY - checksum.

In short solution is possible just generate this numbers as set of random digits. But I think good way is use special generators for Person.

I will prepare PR in next days.