Include the exception from urllib in wget test

Signed-off-by: Prasanna Santhanam <tsp@apache.org>
(cherry picked from commit eb5099a2a25ac509e7455d0652d90b361ec3971d)
CLOUDSTACK-3989: We don't hold the vm object

VirtualMachine.list( only gives the list of vms but not the vm object as
returned by VirtualMachine.create( any operations on the listed VMs then
fails. Explicit call to startVirtualMachine as in setUpClass fixes this.

Signed-off-by: Prasanna Santhanam <tsp@apache.org>
Cloudstack-3299 incorrect arguments sent to the script createIpalias in case of vmware, Cloudstack-3240 corrected a mistake in the script name.

Signed-off-by: Abhinandan Prateek <aprateek@apache.org>