Add spring-cloud project

* [ ] add spring cloud in the data fixtures
* [ ] add spring cloud on the projects page
* [ ] make sure the dedicated GitHub page for spring-cloud works before pushing to production

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* [ ] @ramnivas to provide text for project summary (see https://spring.io/projects ).
* [ ] @ramnivas to take a look at [spring projects gh-pages readme](https://github.com/spring-projects/gh-pages) and start one for the spring-cloud project