Remove JAXB1 references from airline sample [SWS-173]

**[Arjen Poutsma](https://jira.spring.io/secure/ViewProfile.jspa?name=arjen.poutsma)** opened **[SWS-173](https://jira.spring.io/browse/SWS-173?redirect=false)** and commented

http://forum.springframework.org/showthread.php?t=42917


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**Referenced from:** commits https://github.com/spring-projects/spring-ws/commit/880bea088522ce8f41441bd08a5f588f581229a7
