[soa-pmc] build dependency: bootprint-openapi

[Oliver Kopp <kopp.dev@xxxxxxxxx>]

Hey,

I'd like to make the documentation of Winery's REST API available on
the Web. It is already available as a swagger documentation. To
generate a static web page, there is bootprint-openapi tool
(https://github.com/bootprint/bootprint-openapi). I would like to
include it in the build process to generate a page.

The page itself uses jquery and bootstrap, which won't be checked in,
but fetched from a CDN, so that there does not need to be any IP check
of that specific versions used when reading the documentation.

Current output for Winery's REST API:
https://opentosca.github.io/winery/api/ (not checked into the Eclipse
repository, to prevent IP issues).

Cheers,

Oliver