cxf-codegen-plugin 2.2.x version is too old

[egonw]

This version is no longer available from the Maven repositories, and 2.3 is the oldest present:

http://search.maven.org/#search%7Cgav%7C1%7Cg%3A%22org.apache.cxf%22%20AND%20a%3A%22cxf-codegen-plugin%22