OSRA-300 Split Orphan `father_name`: factory

https://osraav.atlassian.net/browse/OSRA-306
OSRA-306 Update orphans factory & seeds

 - remove `father_name`
 - add `father_given_name { Faker::Name.first_name }` &
   `family_name { Faker::Name.last_name }`
 - change from `Faker::Name.name` to `Faker::Name.first_name` for `name` &
   `mother_name`
 - no change necessary to dev seeds