oap_client: move logging to DLOAP logging category

Use libosmocore's DLOAP logging category for OAP.

oap_client_test.c: make sure DLOAP is in DEBUG level to not lose any logging
messages from experr.

Todo: we're using a "Library" logging category, which is not really what the
library category was intended for. Instead, the OAP client should probably be
given a logging category like DVLR or DGPRS in its initialization API.

Related: OS#1592
Change-Id: Ic765c19381b0d983da90a5d8aee9cd17e31cf34a
diff --git a/openbsc/tests/oap/oap_client_test.c b/openbsc/tests/oap/oap_client_test.c
index 1473146..a54e386 100644
--- a/openbsc/tests/oap/oap_client_test.c
+++ b/openbsc/tests/oap/oap_client_test.c
@@ -213,17 +213,12 @@
 	msgb_free(msg_rx);
 }
 
-static struct log_info_cat gprs_categories[] = {
-	[DGPRS] = {
-		.name = "DGPRS",
-		.description = "GPRS Packet Service",
-		.enabled = 1, .loglevel = LOGL_DEBUG,
-	},
+static struct log_info_cat oap_client_test_categories[] = {
 };
 
 static struct log_info info = {
-	.cat = gprs_categories,
-	.num_cat = ARRAY_SIZE(gprs_categories),
+	.cat = oap_client_test_categories,
+	.num_cat = ARRAY_SIZE(oap_client_test_categories),
 };
 
 int main(int argc, char **argv)
@@ -232,10 +227,11 @@
 	osmo_init_logging(&info);
 
 	OSMO_ASSERT(osmo_stderr_target);
-	osmo_stderr_target->use_color = 0;
-	osmo_stderr_target->print_timestamp = 0;
-	osmo_stderr_target->print_filename = 0;
-	osmo_stderr_target->print_category = 1;
+	log_set_use_color(osmo_stderr_target, 0);
+	log_set_print_timestamp(osmo_stderr_target, 0);
+	log_set_print_filename(osmo_stderr_target, 0);
+	log_set_print_category(osmo_stderr_target, 1);
+	log_parse_category_mask(osmo_stderr_target, "DLOAP,1");
 
 	test_oap_api();
 	printf("Done\n");