Merge core and core-tiger modules [SWS-597]

**[Arjen Poutsma](https://jira.spring.io/secure/ViewProfile.jspa?name=arjen.poutsma)** opened **[SWS-597](https://jira.spring.io/browse/SWS-597?redirect=false)** and commented

Since all modules require Java 5 now, we should merge the -tiger modules with the "normal" modules.


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No further details from [SWS-597](https://jira.spring.io/browse/SWS-597?redirect=false)