Improvements

• Add instrumentation for Guava ListenableFutures context propagation #1665
• Add config based base64 decoding to kafka instrumentation #1664
  • This replaces the exception based dectection added in #1656
  • To enable use:
    • Java System Property: -Ddd.kafka.client.base64.decoding.enabled=true or
    • Environment Variable: DD_KAFKA_CLIENT_BASE64_DECODING_ENABLED=true
• [Performance] Replace msgpack-java library #1659

Changes

• Revert service, env, and version log injection (added in #1579 and #1645) #1662
• Make JMX thread deadlock detector init fail graciously #1666

Fixes

• Fix dd-trace-ot transitive dependency on okio by making it explicit #1667