gpnf-set-created-by-property-on-child-entries-after-user-registration.php: Added snippet for GP Nested Forms that sets the created by property on the child entries after user account is created.

gpnf-set-created-by-property-on-child-entries-after-user-registration.php: Added snippet for GP Nested Forms that sets the created by property on the child entries after user account is created. #1669