library/DIAMETER_Templates: fix missing app_id in ts_DIA_AIR

Change-Id: I7b06d9cad09f1fd7858bd745d0aaa2fbcb1983dd
Related: SYS#5602
diff --git a/library/DIAMETER_Templates.ttcn b/library/DIAMETER_Templates.ttcn
index 1b3ffdb..bd9ee21 100644
--- a/library/DIAMETER_Templates.ttcn
+++ b/library/DIAMETER_Templates.ttcn
@@ -893,6 +893,7 @@
 	   template (value) UINT32 ete_id := '00000000'O) :=
 	ts_DIAMETER(flags := '11000000'B,
 		    cmd_code := Authentication_Information,
+		    app_id := int2oct(c_DIAMETER_3GPP_S6_AID, 4),
 		    hbh_id := hbh_id,
 		    ete_id := ete_id,
 		    avps := {