Application couldn't start with previous setup. Plus, maven3 is the preferred way of using cargo now.
See https://codehaus-cargo.github.io/cargo/Maven+3+Plugin.html
Relevant section: Reg. Lifetime of our Maven 2 plugin
" Please be aware that the Maven 2 / Maven 3 plugin of Codehaus Cargo has been retired with our version 1.9.0 and has been superseded by a Maven 3 only plugin. "