CompositeMessageConverter allows different ContentTypeResolvers

CompositeMessageConverter() default constructor doesn't override
MessageConverter contentTypeResolvers anymore. Instead
MessageConverter own contentTypeResolvers are used.

It is still possible to create a CompositeMessageConverter that uses
the same contentTypeResolver for all its MessageConverters thanks to
CompositeMessageConverter(Collection<MessageConverter>,
ContentTypeResolver) constructor or
CompositeMessageConverter#setContentTypeResolver(ContentTypeResolver).

Issue: SPR-11462