Upgrading to Netty 4.2

[tishun]

Closes #3294

Make sure that:

• You have read the contribution guidelines.
• You have created a feature request first to discuss your contribution intent. Please reference the feature request ticket number in the pull request.
• You applied code formatting rules using the mvn formatter:format target. Don’t submit any formatting related changes.
• You submit test cases (unit or integration tests) that back your changes.

[tishun]

@a-TODO-rov , @ggivo before merging we need to test carefully the native transports integration

[tishun]

Good to also check the following, according to the migration guide::

• Ensure endpoint validation is explicitly configured for client TLS connections.
• Explicitly configure your system to use the pooled allocator.