You had produced code that needs JAX-WS 2.1. Version 2.0 does not have WebServiceFeature class, and as result also not constructor in Service with such a argument type.
Additional option "-target 2.0" while using wsimport to generate source codes for JAX-WS 2.0 and so on.
Change your JAX-WS in the preferences. It is compatibility issue for Java 6 SE and Java EE
Changing from Java 1.6 to Java 1.7 also solves this issue.
You can manually add webservices-api.jar from JAX-WS 2.2 API