fix registrant query

src/main/resources/sql/challenge-feeder/detail/get_registrants.sql

@@ -10,19 +10,17 @@ select
        ELSE decode(ri4.value, 'N/A', '0', ri4.value)::int
    END AS rating,
    ri5.value::int AS reliability,
-   c.iso_alpha3_code AS countryCode,
+   ct.iso_alpha3_code AS countryCode,
    p.project_id AS challengeId
   from resource rur
      , resource_info ri1
      , project p
      , user u
-     , common_oltp\:user_address_xref uax
-     , common_oltp\:address a
-     , common_oltp\:country c
      , project_category_lu pcl
      , outer resource_info ri4
      , outer resource_info ri5
      , outer informixoltp\:algo_rating ar
+     , outer(common_oltp\:user_address_xref uax, common_oltp\:address adr, common_oltp\:country ct)
  where
    p.project_id = rur.project_id
   and rur.resource_id = ri1.resource_id
@@ -37,6 +35,6 @@ select
   and ar.coder_id = u.user_id
   and ar.algo_rating_type_id=3
   and uax.user_id = u.user_id
-  and a.address_id = uax.address_id
-  and a.country_code = c.country_code
+  and uax.address_id = adr.address_id
+  and adr.country_code = ct.country_code
   and {filter}