Beware of jetty 7.0

[bimargulies]

I just accidentally tried to run a CXF service under Jetty 7.0 by running
mvn jetty:run without a dependency in my pom to constrain to jetty 6.

There seems to be a standards feud between Spring and jetty; jetty proceeded
to complain that some of Spring's PostConstruct annotations were invalid,
and then the stack traces came thick and fast.