The hook now calls the share manager that will call the responsible
shareProvider to do the proper cleanup.
* Unit tests added
Again nothing should change it is just to cleanup old code
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
