Change Zipkin/Brave XML to use brave-spring-beans

I noticed the sample projects don't connect to any server. This could make it hard for someone to get started. Also, the XML beans don't use the helpers that exist in brave.

https://github.com/apache/cxf/tree/master/distribution/src/main/release/samples/jax_rs/tracing_brave
https://github.com/apache/cxf/tree/master/distribution/src/main/release/samples/jax_rs/tracing_brave_osgi
https://github.com/apache/cxf/tree/master/distribution/src/main/release/samples/jaxws_tracing_brave_osgi

Could these be changed to use brave-spring-beans? or otherwise make a functional tracer? https://github.com/openzipkin/brave/tree/master/spring-beans

Here are some example configurations:
https://github.com/openzipkin/brave-webmvc-example/blob/master/webmvc3/src/main/webapp/WEB-INF/applicationContext.xml
https://github.com/openzipkin/brave-webmvc-example/blob/master/webmvc4-boot/src/main/java/brave/webmvc/TracingConfiguration.java