Netty project 4.1.25

[sullis]

Description

upgrade to latest Netty (4.1.25)

Motivation and Context

Testing

Screenshots (if appropriate)

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)

Checklist

• [x ] I have read the CONTRIBUTING document
• [x ] Local run of mvn install succeeds
• [x ] My code follows the code style of this project
• My change requires a change to the Javadoc documentation
• I have updated the Javadoc documentation accordingly
• [x ] I have read the README document
• I have added tests to cover my changes
• [x ] All new and existing tests passed
• A short description of the change has been added to the CHANGELOG

License

• I confirm that this pull request can be released under the Apache 2 license

[sullis]

ready for merge.

[sullis]

@zoewangg

[sullis]

obsolete.