sysdb: do not treat missing id-override as an error

In sysdb_search_user_by_upn_with_view_res()
sysdb_add_overrides_to_object() can return ENOENT if there is no
id-override for the given user. This is expected and should not be
treated as an error.

Reviewed-by: Alexey Tikhonov <atikhono@redhat.com>
(cherry picked from commit 72a42d5)

Author: sumit-bose

src/db/sysdb_ops.c

@@ -743,6 +743,7 @@ int sysdb_search_user_by_upn_with_view_res(TALLOC_CTX *mem_ctx,
             DEBUG(SSSDBG_OP_FAILURE, "sysdb_add_overrides_to_object failed.\n");
             return ret;
         }
+        ret = EOK;
     }
 
     *out_res = orig_obj;