mm_rx_id_resp(): use osmo_mi_name()

Change-Id: I6bb053def223ed698351ad9f52c1e36293df5d59
diff --git a/tests/msc_vlr/msc_vlr_test_rest.err b/tests/msc_vlr/msc_vlr_test_rest.err
index 42ce1e0..6d98408 100644
--- a/tests/msc_vlr/msc_vlr_test_rest.err
+++ b/tests/msc_vlr/msc_vlr_test_rest.err
@@ -402,7 +402,7 @@
   MSC <--GERAN-A-- MS: GSM48_MT_MM_ID_RESP
 DREF TMSI-0x23422342: MSC conn use + dtap == 1 (0x2: dtap)
 DRLL Dispatching 04.08 message GSM48_MT_MM_ID_RESP (0x5:0x19)
-DMM IDENTITY RESPONSE: MI(IMSI)=901700000004620
+DMM IDENTITY RESPONSE: MI=IMSI-901700000004620
 DVLR set IMSI on subscriber; IMSI=901700000004620 id=901700000004620
 DVLR vlr_lu_fsm(TMSI-0x23422342:GERAN-A-0:LU){VLR_ULA_S_WAIT_IMSI}: Received Event VLR_ULA_E_ID_IMSI
 DVLR set IMSI on subscriber; IMSI=901700000004620 id=901700000004620