Make using absolute vs. relative links in JSON API pagination links configurable.

Is there a way the absolute parameter can be made configurable (in application.yml) when rendering the paging links? Currently the only way to do this is through using a custom baseTemplateClass and overriding the jsonapi object.
```
./DefaultJsonViewHelper.groovy: links << new Link("first", link(resource: object, method: HttpMethod.GET, absolute: true, params: firstParams))
./DefaultJsonViewHelper.groovy: links << new Link("prev", link(resource: object, method: HttpMethod.GET, absolute: true, params: prevParams))
./DefaultJsonViewHelper.groovy: links << new Link("next", link(resource: object, method: HttpMethod.GET, absolute: true, params: nextParams))
./DefaultJsonViewHelper.groovy: links << new Link("last", link(resource: object, method: HttpMethod.GET, absolute: true, params: lastParams))
```

Start with DefaultJsonViewHelper.groovy and the application.yml configuration path described in the issue. Trace how the pagination links are rendered, then verify that the absolute-versus-relative choice can be configured for the first, previous, next, and last links.

Written by the indexing model from the issue text.