[rust] Use drivers found in PATH only when browser version is not spe…

…cified (SeleniumHQ#13159)

[py] Bump version to 4a6

Updating .NET tests

[java] Switching default client implementation from okhttp to netty

Adjusting Rakefile for next release

Prevent chromium driver info from being considered a class that be ne…

…wed up

Updating Java changelog

Bump the java version and update changelogs

Bump the number of jetty threads to 200

[rb] update chrome CDP endpoint

send_command was deprecated in chromedriver 2.40