OSRA-300 - refine Orphan#full_name

OSRA-304 - change implementation of Orphan#full_name

 - based on clarification from client, change the method to compose
   an orphan's `full_name` out of `name`, `father_given_name` and `family_name`
 - revert orphans.feature to original
Merge pull request #231 from NikitaAvvakumov/osra-304-pt2-refine-orphan-full-name

OSRA-300 - refine Orphan#full_name