Fix B3Codec's trace_id zero-padding for 32bit IDs

[mizhexiaoxiao]

Which problem is this PR solving?

• Solve the problem of incorrect traceid injection when the traceid is 128bit and starts with 0

Short description of the changes

For example, if the traceid is 023f352eaefd8b887a06732f5312e2de, it will inject as 23f352eaefd8b887a06732f5312e2de, which will cause the trace to split into two because the traceid is different

Signed-off-by: mizhexiaoxiao 1157861072@qq.com

[yurishkuro]

Also, please fix the DCO (see CONTRIBUTING.md)

[mizhexiaoxiao]

Thanks for the review!
Unit tests have been added

[yurishkuro]

The DCO check is still failing, please sign all commits (see CONTRIBUTING)

[mizhexiaoxiao]

Thank you for your patient reply, it should be ok now

[yurishkuro]

You can run "make lint" locally before submitting

[mizhexiaoxiao]

done :)

[codecov]

Codecov Report

Merging #322 (1c7d59a) into master (9ccc29c) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master     #322   +/-   ##
=======================================
  Coverage   95.42%   95.43%           
=======================================
  Files          25       25           
  Lines        1967     1971    +4     
  Branches      272      273    +1     
=======================================
+ Hits         1877     1881    +4     
  Misses         56       56           
  Partials       34       34           

Impacted Files	Coverage Δ
jaeger_client/codecs.py	97.05% <100.00%> (+0.05%)	⬆️
jaeger_client/config.py	95.60% <100.00%> (ø)

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 9ccc29c...1c7d59a. Read the comment docs.

[yurishkuro]

Thanks!

[yurishkuro]

https://github.com/jaegertracing/jaeger-client-python/releases/tag/4.6.1