Investigate move to DefaultUriBuilderFactory in ControllerLinkBuilder

[odrotbohm]

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ControllerLinkBuilder is currently using an extension of DefaultUriTemplateHandler to control which parts of a UriComponentsBuilder get encoded on expansion. DUTH has been deprecated since Spring 5.0 in favor of DefaultUriBuilderFactory whose usage pattern seems to differ from DUTH and indicates it might allow us to fundamentally revisit the usage of UriComponents/…Builder in the class hierarchy of LinkBuilderSupport.

We probably need to consult @rstoyanchev on that one.