Vagrant takes "private_key_path" as an array to support multiple private keys
Enable auto-naming for multiple-VMs scenario
Merge branch 'patch-multiple-private-keys' of https://github.com/henrysher/vagrant-vsphere into henrysher-patch-multiple-private-keys
Merge branch 'patch-auto-naming' of https://github.com/henrysher/vagrant-vsphere into henrysher-patch-auto-naming
merge pull requests and bump version
code clean up