Use admin-unit label method instead of title attribute.
Merge pull request #481 from 4teamwork/deif-rebase-drop-client-id

Drop `get_client_id` and `IBaseClientID`
Update profile versions for `opengever.globalindex`.
Update profile versions for `opengever.ogds.base`.
Update profile versions for `opengever.task`.
Add missing initial profile version for `opengever.tasktemplates`.
Add missing initial profile version for `opengever.trash`.
Bump metadata for default profile to current version.
Update package version and metadata.
Merge pull request #482 from 4teamwork/deif-update-profile-ids

Update profile versions for `opengever.core` 4.x release
Make sure upgrade runs without IClientConfiguration interface definition.
Remove `IClientConfiguration` from plone registry.
Cleanup unused imports.