Fail build if netty-all pulls in duplicated classes (#11804)
Fail build if netty-all pulls in duplicated classes (#11804)


Motivation:

We should fail the build if netty-all pulls in dependencies that produce duplicated classes on the classpath

Modifications:

Add maven plugin to verify we not have duplicated classes on the classpath / dependencies

Result:

Related to https://github.com/netty/netty/issues/11791

doom369/netty,tbrooks8/netty,tbrooks8/netty,doom369/netty,netty/netty,netty/netty,Spikhalskiy/netty,doom369/netty,netty/netty,Spikhalskiy/netty,doom369/netty,netty/netty,Spikhalskiy/netty,johnou/netty,tbrooks8/netty,netty/netty,doom369/netty,johnou/netty,johnou/netty,Spikhalskiy/netty,tbrooks8/netty,johnou/netty,Spikhalskiy/netty,johnou/netty,tbrooks8/netty