upgrade netty version and fix miss dependency classes issue

Change shade plugin version and remove duplicate relocation

Add “ClassLoader” paramter for enhance method. Prepare for improving interceptor initialization performance.

Merge branch 'feature/high-performance-agent' of https://github.com/wu-sheng/sky-walking into feature/high-performance-agent

* 'feature/high-performance-agent' of https://github.com/wu-sheng/sky-walking:
  let the sense of filter more clear
  Fix issue that skywalking-agent.jar include the google class  and exclude the proto files inside protobuf-java

Exclude google class when shading skywalking-agent.jar

Fix issue that skywalking-agent.jar include the google class  and exclude the proto files inside protobuf-java

Merge branch 'feature/high-performance-agent' of https://github.com/wu-sheng/sky-walking into feature/high-performance-agent

* 'feature/high-performance-agent' of https://github.com/wu-sheng/sky-walking:
  fixed grpc proto compile error