support global tag of tracer in current whole system

[taotao365s]

Your question

we want to distinct different region (or other key biz info), for example , it is zone1, when it is in zone1. it is zone2, when it is in zone2

Your scenes

describe your use scenes (why need this feature)

Your advice

describe the advice or solution you'd like

Environment

• SOFATracer version:
• JVM version (e.g. java -version):
• OS version (e.g. uname -a):
• Maven version:
• IDE version:

[glmapper]

@spyvip can you provide more information about the scene? maybe the biz baggage could support this case?

[taotao365s]

@glmapper we want to controll global tag just in init or start when application start, so it can upload to jaedger or zipkin, so can to mark it