Update the Zipkin attribute names for the ot to otel

[danrusei]

Update the attribute names for the OTel attributes for the zipkin exporter
Based on the spec change: open-telemetry/opentelemetry-specification#967

[codecov]

Codecov Report

Merging #1201 into master will decrease coverage by 0.2%.
The diff coverage is n/a.

@@           Coverage Diff            @@
##           master   #1201     +/-   ##
========================================
- Coverage    76.6%   76.4%   -0.3%     
========================================
  Files         134     134             
  Lines        5695    5723     +28     
========================================
+ Hits         4368    4373      +5     
- Misses       1082    1106     +24     
+ Partials      245     244      -1     

Impacted Files	Coverage Δ
exporters/trace/zipkin/model.go	98.6% <ø> (ø)
sdk/export/metric/exportkind_string.go	66.6% <0.0%> (-33.4%)	⬇️
label/type_string.go	7.1% <0.0%> (-26.2%)	⬇️
api/metric/kind_string.go	10.0% <0.0%> (-23.4%)	⬇️
api/metric/numberkind_string.go	16.6% <0.0%> (-16.7%)	⬇️
api/trace/api.go	57.1% <0.0%> (ø)
api/global/internal/trace.go	88.8% <0.0%> (ø)
api/trace/noop_trace_provider.go	100.0% <0.0%> (ø)
semconv/http.go	95.3% <0.0%> (+<0.1%)	⬆️
sdk/trace/batch_span_processor.go	80.6% <0.0%> (+2.1%)	⬆️

[XSAM]

opentelemetry-go/exporters/trace/zipkin/model.go

Lines 156 to 157 in 817a1d0

	m["ot.status_code"] = data.StatusCode.String()
	m["ot.status_description"] = data.StatusMessage

Should we update these names too?

[danrusei]

opentelemetry-go/exporters/trace/zipkin/model.go

Lines 156 to 157 in 817a1d0

	m["ot.status_code"] = data.StatusCode.String()
	m["ot.status_description"] = data.StatusMessage

Should we update these names too?

Thank you for pointing that out, will do.

[XSAM]

Looks good, thanks for your contribution.