[maven-release-plugin] prepare for next development iteration
Merge remote branch 'origin/release/3.1.1' into dev
[issue #8] ug delete now deletes all relevant permissions
[issue #8] added ug delete test, but it is deactivated as it requires a postgres db with an initial cids system, see [cids-init](https://github.com/cismet/cids-init)
Merge branch 'bug/8-ug-del-all-perms' into dev
upgrade to newest cismet-commons version2
[issue #12] replaced getClassPermission by getPermission template operation
[issue #11] added copy operation for usergroups
[issue #10] added getter for the backend to persistence provider
Merge branch 'feature/12-permissions-per-usergroup' into dev
Merge branch 'feature/11-copy-usergroup' into dev
Merge branch 'feature/10-backend-from-persistenceprovider' into dev
[maven-release-plugin] prepare release data-objects-3.2
Release of data-objects-3.2