Rename controllers.admin_user column to admin_identity_name

Signed-off-by: Babak K. Shandiz <[email protected]>

internal/dbmodel/sql/postgres/1_6.sql

@@ -14,6 +14,7 @@ ALTER TABLE IF EXISTS models RENAME COLUMN owner_username TO owner_identity_name
 ALTER TABLE IF EXISTS application_offer_connections RENAME COLUMN username TO identity_name;
 ALTER TABLE IF EXISTS user_model_defaults RENAME TO identity_model_defaults;
 ALTER TABLE IF EXISTS identity_model_defaults RENAME COLUMN username TO identity_name;
+ALTER TABLE IF EXISTS controllers RENAME COLUMN admin_user TO admin_identity_name;
 ALTER TABLE IF EXISTS audit_log RENAME COLUMN user_tag TO identity_tag;
 
 -- Renaming indexes:
@@ -27,9 +28,6 @@ ALTER INDEX IF EXISTS cloud_credentials_cloud_name_owner_username_name_key RENAM
 ALTER INDEX IF EXISTS cloud_defaults_username_cloud_id_region_key RENAME TO cloud_defaults_identity_name_cloud_id_region_key;
 ALTER INDEX IF EXISTS idx_audit_log_user_tag RENAME TO idx_audit_log_identity_tag;
 
--- TODO (CSS-6701): Do we need to rename these instances as well?
---   - ALTER TABLE IF EXISTS controllers RENAME COLUMN admin_user TO admin_identity_name;
-
 -- We don't need to rename columns in these tables, because they're already
 -- dropped in an earlier migration:
 --   - user_application_offer_access