minor refactor of jaeger function

Signed-off-by: Aditi Ahuja <ahuja.aditi@gmail.com>

pkg/tracing/jaeger/jaeger.go

@@ -50,15 +50,24 @@ func NewTracerProvider(ctx context.Context, logger log.Logger, conf []byte) (*tr
 	}
 
 	processor := tracesdk.NewBatchSpanProcessor(exporter)
+	tp := newTraceProvider(ctx, logger, processor, config.ServiceName)
+
+	return tp, nil
+}
+
+func newTraceProvider(ctx context.Context, logger log.Logger, processor tracesdk.SpanProcessor,
+	serviceName string) *tracesdk.TracerProvider {
+
+	// need to add sampler config details here
 	tp := tracesdk.NewTracerProvider(
 		tracesdk.WithSpanProcessor(processor),
-		tracesdk.WithBatcher(exporter),
 		tracesdk.WithResource(resource.NewWithAttributes(
 			semconv.SchemaURL,
-			semconv.ServiceNameKey.String(config.ServiceName),
+			semconv.ServiceNameKey.String(serviceName),
 		)),
 	)
-	return tp, nil
+
+	return tp
 }
 
 // NewTracer create tracer from YAML.