schemaS element for PayloadValidatingInterceptor missing [SWS-44]

**[Ingo](https://jira.spring.io/secure/ViewProfile.jspa?name=res1st)** opened **[SWS-44](https://jira.spring.io/browse/SWS-44?redirect=false)** and commented

I have more than one schema which PayloadValidatingInterceptor should use.
The JAXB marshaller have an schemas element, something similar would be nice for the PayloadValidatingInterceptor.


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**Affects:** 1.0 M2
