Integrate maven tooltip generator plugin into build workflow

[gashcrumb]

Follow on from #20 the plugin is there but not part of the build.

For a first draft we should just ensure the generator is run as part of building the documentation project and generate the tooltip JSON into target, at the very least then we'll have a json file that could be copied into the UI project somewhere.

@rhuss FYI

related to syndesisio/syndesis-project#47

[rhuss]

I would go even so far that this file is created somewhere directly below a fixed directory in this repo, and then committed to git). Then, the syndesis-ui build could directly download this file from the raw URL from github when it fetches the tooltips.

This should be really a big issue, however would need to know a bit more about the dev process in this repo (e.g. how and when the documentatio is rebuild)

[gashcrumb]

Yeah, that'd probably better I guess, as otherwise we'd have to know that changes occurred. I guess we'd want to know about those anyways so the right controls can be annotated with tooltips. Whatever's easiest I guess :-)