tests/iuup: Showcase IuUP stack not answering subsequent Init msgs

This test shows a bug in IuUP stack which makes it only handle the first
Initialization IuUP message. After it moves to SMpSDU, it stops handling
Initialization messages.
A fix is provided in a follow up patch.

Related: SYS#5995
Change-Id: I72c2c2d88f158f3ef35724fcb73854a1827aaab4
diff --git a/tests/iuup/iuup_test.ok b/tests/iuup/iuup_test.ok
index a2f48ec..93f6954 100644
--- a/tests/iuup/iuup_test.ok
+++ b/tests/iuup/iuup_test.ok
@@ -44,6 +44,14 @@
 _passive_init_transport_prim_cb()
 Transport: DL len=35: 01 00 e3 ff 08 55 6d 94 4c 71 a1 a0 81 e7 ea d2 04 24 44 80 00 0e cd 82 b8 11 18 00 00 97 c4 79 4e 77 40 
 sys={0.000000}, clock_override_set
+_passive_init_retrans_user_prim_cb()
+_passive_init_transport_prim_cb()
+Transport: DL len=4: e4 00 24 00 
+_passive_init_retrans_user_prim_cb()
+User: UL len=31: 08 55 6d 94 4c 71 a1 a0 81 e7 ea d2 04 24 44 80 00 0e cd 82 b8 11 18 00 00 97 c4 79 4e 77 40 
+_passive_init_transport_prim_cb()
+Transport: DL len=35: 01 00 e3 ff 08 55 6d 94 4c 71 a1 a0 81 e7 ea d2 04 24 44 80 00 0e cd 82 b8 11 18 00 00 97 c4 79 4e 77 40 
+sys={0.000000}, clock_override_set
 _decode_passive_init_2_rfci_no_iptis_user_prim_cb(): Initialization decoded fine!
 _decode_passive_init_2_rfci_no_iptis_transport_prim_cb()
 Transport: DL len=4: e4 00 24 00