Implement missing lease downgrades

1. When deleting a file, all leases granting handle caching lease to the file should be recalled:

   https://bugzilla.samba.org/show_bug.cgi?id=13458

2. Check for open destination when renaming including checking for handle lease breaks:

   https://bugzilla.samba.org/show_bug.cgi?id=15608

3. Directory renames must recursively break all h-leases.

4. Pending initial-delete-on-close must break h-leases for three cases:

   1. tree disconnect
   2. session logoff
   3. TCP disconnect