support manual reporting data

[limx198918]

Provide Zipkin service reporting method, support manual reporting data, more flexible

[guanchao-yang]

@limx198918 SOFATracer based on OpenTracing API, so we can use SOFATracer API and convert Model to Zipkin through SOFATracer API we have flexible function.

[limx198918]

Where can SOFATracer API be seen?

[guanchao-yang]

@limx198918 Here

[limx198918]

sofatracecontext sofatracecontext = sofatracecontextholder .getsofatracecontext（）；
sofatracecontext能支持上报吗，里面的push方法是的吗吗？

[guanchao-yang]

@limx198918 里面操作的对象是 SOFATracer Span 基于 OpenTracing 的 Span 标准，可以向 Span 中按照 OpenTracing 的方式存放 Tags 或者 Baggage，到时候模型转化的时候，会转为 Zipkin 的 模型。