OSRA-300 Split `father_name`: orphan uniqueness

OSRA-308 Update orphan uniqueness validation

 - scope of uniqueness validation updated to include `father_given_name`,
   `mother_name` & `family_name`
Merge pull request #235 from NikitaAvvakumov/osra-308-orphan-uniqueness-validation

OSRA-300 Split `father_name`: orphan uniqueness