* [REPO-5185] REST API: Add endpoint to expose the groups of a site
* fix comments
* * fixed test
* * added isMemberOf group property
* * fixed displayName
* * where class support added
* * rename models
* * fixed java docs
* * fixed braces
* * fxed comments
* fixed test
* REPO-3149 / MNT-19035 - Limit the /people/<username>/sites API (V0 and V1) to filter out private sites when querying for users other than currently authenticated one and site admins.
- Tests: changed most of the site names to unique values, to be able to rerun tests locally without cleaning the database.
* REPO-2811 / ALF-21924: "Internal Server Error" when listSites is invoked for users belonging to a deleted Site
- added a fix by not adding site / user pair to the membership list if the role is null
- added a Junit with a check to see that matching of sites still works