Fix CI issue.

package com.a.eye.skywalking.api.context;

import com.a.eye.skywalking.api.boot.ServiceManager;

import com.a.eye.skywalking.trace.Span;

import com.a.eye.skywalking.trace.TraceSegment;

import com.a.eye.skywalking.trace.tag.Tags;

import org.junit.After;

import org.junit.Assert;

import org.junit.BeforeClass;

import org.junit.Test;

/**

 * Created by wusheng on 2017/2/19.

 */

public class ContextManagerTestCase {

    @BeforeClass

    public static void setup(){

        ServiceManager.INSTANCE.boot();

    }

    @Test

    public void testDelegateToTracerContext(){

        Span span = ContextManager.createSpan("serviceA");