the project crashed and as far as i understand thats because of version conflict Netty.
Don’t share the classpath between your Java application and your Gatling tests.
I extract and investigate this two archive and they absolutely the same .
They are not. You’re not display hidden folders (name starting with a dot).
Is it possible to specify with an argument where my tests are located?
No
Otherwise I will be forced to copy and paste test
Wrong. You can have your Gatling maven project in a subfolder of your application code repository, without mixing with your application dependencies.