scripts use the ipappliance class

Instead of the other way around, like it was...
clone_template script knows how to configure appliances
IPAppliance instantiation tests
Merge pull request #1206 from seandst/scripts-use-ipappliance

Scripts use ipappliance
Convert VMWareSystem to psphere
Fix the deploying + minor fixes.
improved get_ip_address, _get_resource_pool, _get_list_vms