cosmetic: rename gsm_subscriber_connection->conn_fsm to ->fi

Match osmo-bsc's naming of the subscriber connection's FSM instance; 'conn->fi'
makes more sense anyway than 'conn->conn_fsm'.

BTW, an upcoming commit will do away with the legacy from libbsc/libmsc duality
and firmly glue the conn allocation to the fi.

Related: OS#3122
Change-Id: If442f2ba78d9722b1065ec30c9a13f372b6a8caa
diff --git a/tests/msc_vlr/msc_vlr_test_gsm_ciph.c b/tests/msc_vlr/msc_vlr_test_gsm_ciph.c
index d8ea6ba..8a05b3f 100644
--- a/tests/msc_vlr/msc_vlr_test_gsm_ciph.c
+++ b/tests/msc_vlr/msc_vlr_test_gsm_ciph.c
@@ -101,7 +101,7 @@
 	auth_request_expect_rand = "12aca96fb4ffdea5c985cbafa9b6e18b";
 	ms_sends_msg("05247803305886089910070000006402");
 	OSMO_ASSERT(g_conn);
-	OSMO_ASSERT(g_conn->conn_fsm);
+	OSMO_ASSERT(g_conn->fi);
 	OSMO_ASSERT(g_conn->vsub);
 	VERBOSE_ASSERT(auth_request_sent, == true, "%d");
 	VERBOSE_ASSERT(cm_service_result_sent, == RES_NONE, "%d");
@@ -340,7 +340,7 @@
 	auth_request_expect_autn = NULL;
 	ms_sends_msg("05247803305886" "05f4" "03020100");
 	OSMO_ASSERT(g_conn);
-	OSMO_ASSERT(g_conn->conn_fsm);
+	OSMO_ASSERT(g_conn->fi);
 	OSMO_ASSERT(g_conn->vsub);
 	VERBOSE_ASSERT(auth_request_sent, == true, "%d");
 	VERBOSE_ASSERT(cm_service_result_sent, == RES_NONE, "%d");
@@ -934,7 +934,7 @@
 		     "03575886" /* classmark 2 */
 		     "089910070000106005" /* IMSI */);
 	OSMO_ASSERT(g_conn);
-	OSMO_ASSERT(g_conn->conn_fsm);
+	OSMO_ASSERT(g_conn->fi);
 	OSMO_ASSERT(g_conn->vsub);
 	VERBOSE_ASSERT(cm_service_result_sent, == RES_NONE, "%d");
 	VERBOSE_ASSERT(auth_request_sent, == true, "%d");