Added cxf-xjc and cxf-codegen

There was a cxf connector at https://github.com/sslavic/m2e-cxf-codegen-connector. this one had an error in fetching the wsdl options.
I also added handling of the default option. This plugin has still dependencies from the original, namely the Apache cxf-codegen-plugin and bitstrings common. I might just get rid of them by using reflection, like in the cxf-xjc plugin