src: rename msg_entr* to osmo_config_*

Summary of changes:

s/msg_entry_parse/osmo_config_list_parse/g
s/msg_entry/osmo_config_entry/g
s/msg_entries/osmo_config_list/g
diff --git a/openbsc/tests/bsc-nat/bsc_nat_test.c b/openbsc/tests/bsc-nat/bsc_nat_test.c
index ec3a532..6ec22c5 100644
--- a/openbsc/tests/bsc-nat/bsc_nat_test.c
+++ b/openbsc/tests/bsc-nat/bsc_nat_test.c
@@ -844,8 +844,8 @@
 	struct bsc_nat *nat = bsc_nat_alloc();
 
 	/* a fake list */
-	struct msg_entries entries;
-	struct msg_entry entry;
+	struct osmo_config_list entries;
+	struct osmo_config_entry entry;
 
 	INIT_LLIST_HEAD(&entries.entry);
 	entry.mcc = "274";