Make sure different tracers in HotROD process use different random ge…

…nerator seeds

Signed-off-by: Yuri Shkuro <ys@uber.com>

examples/hotrod/pkg/tracing/init.go

@@ -37,9 +37,11 @@ func Init(serviceName string, metricsFactory metrics.Factory, logger log.Factory
 		Reporter: &config.ReporterConfig{
 			LogSpans:            false,
 			BufferFlushInterval: 1 * time.Second,
-			LocalAgentHostPort: hostPort,
+			LocalAgentHostPort:  hostPort,
 		},
 	}
+	// TODO(ys) a quick hack to ensure random generators get different seeds, which are based on current time.
+	time.Sleep(100 * time.Millisecond)
 	tracer, _, err := cfg.New(
 		serviceName,
 		config.Logger(jaegerLoggerAdapter{logger.Bg()}),