tests: Set print_category values explicitly

This will alow easily changing default values for print_category vs
print_category_hex later.

In any case, every test relying on logging output validation should
always explicitly state the config to avoid issues in the future if
default values change.

Related: OS#5034
Change-Id: If29b40557d5c2bcda04b964f344070bad58d8f28
diff --git a/tests/loggingrb/loggingrb_test.c b/tests/loggingrb/loggingrb_test.c
index 0b2ae5b..4a4d1f9 100644
--- a/tests/loggingrb/loggingrb_test.c
+++ b/tests/loggingrb/loggingrb_test.c
@@ -65,6 +65,8 @@
 	log_add_target(ringbuf_target);
 	log_set_all_filter(ringbuf_target, 1);
 	log_set_print_filename(ringbuf_target, 0);
+	log_set_print_category(ringbuf_target, 0);
+	log_set_print_category_hex(ringbuf_target, 0);
 
 	log_parse_category_mask(ringbuf_target, "DRLL:DCC");
 	log_parse_category_mask(ringbuf_target, "DRLL");