Removed the redeclaration of hasCorsConfigurationSource(…) in RepositoryRestHandlerMapping as it already inherits the one from BasePathAwareRestHandlerMapping.
Removed @Override on BasePathAwareRestHandlerMapping.hasCorsConfigurationSource(…) as we need to compile against Spring 5.1, which doesn't expose the method. Downgrades from Spring HATEOAS 1.0 API usage in tests.
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