test: make uuid.test tap-compatible

Part of #7618

NO_DOC=internal
NO_CHANGELOG=internal

test/unit/uuid.c

-#include "unit.h"
 #include "core/random.h"
 #include "mp_uuid.h"
 #include "msgpuck/msgpuck.h"
@@ -6,6 +5,9 @@
 #include "tt_uuid.h"
 #include <string.h>
 
+#define UNIT_TAP_COMPATIBLE 1
+#include "unit.h"
+
 static void
 uuid_test(struct tt_uuid a, struct tt_uuid b, int expected_result)
 {

test/unit/uuid.result

-1..4
-ok 1 - 6611265b-8852-4832-af8b-4164d52c62eb > 186ebbf7-cf97-4e2e-8b1b-76154f6f3949
-ok 2 - 075b4148-8fb0-2e7f-af50-4164d52c62eb < 1fbc929f-5da8-28c5-8b36-76154f6f3949
-    1..4
-    ok 1 - mp_sizeof_uuid() == encoded length
-    ok 2 - mp_decode_uuid() return code
-    ok 3 - mp_sizeof_uuid() == decoded length
-    ok 4 - mp_decode_uuid(mp_encode_uuid(uu)) == uu
-ok 3 - subtests
-    1..5
-	*** mp_print_test ***
-    ok 1 - correct mp_snprint size with empty buffer
-    ok 2 - correct mp_snprint size
-    ok 3 - correct mp_snprint result
-    ok 4 - correct mp_fprint size
-    ok 5 - correct mp_fprint result
-	*** mp_print_test: done ***
-ok 4 - subtests