Annotation @Reference can't support to export a service with a sync one and an async one

[jayruen]

• I have searched the issues of this repository and believe that this is not a duplicate.
• I have checked the FAQ of this repository and believe that this is not a duplicate.

Environment

• Dubbo version: 2.6.2
• Operating System version: Win7
• Java version: 1.8

Step to reproduce this issue

不支持同时存在一个异步引用和一个同步引用，dubbo注入两个对象的地址都是相同的，第一个如果是异步则两个都是异步。 第一如果是同步则两个都是同步

@Reference(async = true)
private DebugService ansyncDebugService;

@Reference(async = false)
private DebugService debugService;

[diecui1202]

@mercyblitz How about this issue ?

[cvictory]

@mercyblitz How is it going?

[zonghaishang]

same as : #2522

I will fix it this weekend.

[rs-frank]

这个问题是不是 2.6.4已经解决了？ 貌似现在 可以了。
在一个方法内测试了一下 还没有具体多个地方测试 不清楚是不是Context在同一个Context的原因

[zonghaishang]

fixed, close it now. see : #2649