TestLogger: if TEST_QUIET is defined, reduce loglevel to 'info'

testutils/logger.go

@@ -23,6 +23,9 @@
 	if os.Getenv("TEST_TRACE") != "" {
 		level = zerolog.TraceLevel
 	}
+	if os.Getenv("TEST_QUIET") != "" {
+		level = zerolog.InfoLevel
+	}
 	return zerolog.New(zerolog.ConsoleWriter{Out: tl}).
 		With().Timestamp().Logger().
 		Level(level)