replace osmo_counter with stat_items

osmo_counter will be soon deprecated. Use the newer and more flexible
osmo_stat_item instead.

Depends on: Id2462c4866bd22bc2338c9c8f69b775f88ae7511 (libosmocore)
Change-Id: I6a20123b263f4f808153794ee8a735092deb399e
diff --git a/tests/msc_vlr/msc_vlr_test_ss.err b/tests/msc_vlr/msc_vlr_test_ss.err
index 9f47dba..243f7e0 100644
--- a/tests/msc_vlr/msc_vlr_test_ss.err
+++ b/tests/msc_vlr/msc_vlr_test_ss.err
@@ -1,6 +1,6 @@
 DLMGCP MGCP client: using endpoint domain '@mgw'
 full talloc report on 'msgb' (total      0 bytes in   1 blocks)
-talloc_total_blocks(tall_bsc_ctx) == 17
+talloc_total_blocks(tall_bsc_ctx) == 19
 
 ===== test_ss_ussd_mo_geran
 - Location Update request causes a GSUP LU request to HLR
@@ -235,7 +235,7 @@
 ===== test_ss_ussd_mo_geran: SUCCESS
 
 full talloc report on 'msgb' (total      0 bytes in   1 blocks)
-talloc_total_blocks(tall_bsc_ctx) == 17
+talloc_total_blocks(tall_bsc_ctx) == 19
 
 ===== test_ss_ussd_no_geran
 - Location Update request causes a GSUP LU request to HLR
@@ -495,8 +495,8 @@
 ===== test_ss_ussd_no_geran: SUCCESS
 
 full talloc report on 'msgb' (total      0 bytes in   1 blocks)
-talloc_total_blocks(tall_bsc_ctx) == 17
+talloc_total_blocks(tall_bsc_ctx) == 19
 
 full talloc report on 'msgb' (total      0 bytes in   1 blocks)
-talloc_total_blocks(tall_bsc_ctx) == 17
+talloc_total_blocks(tall_bsc_ctx) == 19