Improvements

• Additional tags AWS SDK #976

• Added setting to rename services by tag #975
  For example, this setting can be used to rename aws-sdk spans to be identified with the corresponding aws.service tag:

  -Ddd.trace.split-by-tags=aws.service

• Added support for haystack trace propagation #895 (Thanks to @aantono for the contribution)

Changes

• Don't add language tag to client spans #974
• Rename Config.SERVICE to SERVICE_TAG #985

Fixes

• Default operation name for @Trace annotations #979
• gRPC span error tagging #980 (Thanks to @marcoferrer for the contribution)
• Reduce coordination overhead in RateByServiceSampler #986
• Reduce default cache size #983