- modified delete port task to take a list of ports and delete all
specified ports as well as taking a single port
- delete port task also does not throw an exception upon failure to
delete a port, it instead logs a warning
- modified delete cluster flow to retrieve a list of ports for a VM and
attempt to delete each port after deleting the VM
Change-Id: Ib311b23fdf3a58bc4b79257ed412e9d53d039013
closes-bug: 1448140