This makes the post_userDelete hook call the sharemanager. This will
cleanup to and from this user.
* All shares owned by this user
* All shares with this user (user)
* All custom group shares
* All link share initiated by this user (to avoid invisible link shares)
Unit tests are added for the defaultshare provider as well as the
federated share provider
In 9.0 we converted the old shares to the new shares. So for 9.1 we can
savely remove the fallback code.
This code was required when there was no initiator set.
* Fixed unit tests
