added post-processor-vsphere

I refactored my post-processor for uploading vms to vSphere and integrated it directly into packer.

Here is how to use it:

"post-processors": [
  {
    "type": "vsphere",
    "vm_name": "My_VM",
    "vm_folder": "Test-VMs",
    "host": "vcenter.domain.tld",
    "username": "me",
    "password": "secret",
    "datacenter": "dc",
    "datastore": "ds1",
    "vm_network": "Test_Network",
    "path_to_resouce_pool": "host/Dev_Cluster/Resources/Test_Pool,
    "insecure" : true
  }
]

Make sure you have VMware OVF Tool installed and included in PATH.