Include ancestors in results of listCollectionsRecursive
Include ancestors in results of listCollectionsRecursive

This fixes a crash when recursively searching in a collection that
has no children, which returned no results, and QueryBuilder then
asserted on empty WHERE..IN () condition.

kolab-groupware/akonadi,kolab-groupware/akonadi,kolab-groupware/akonadi,kolab-groupware/akonadi