VMware: Config Drive Support

Create the config drive iso, upload it to the correct location,
then create a VirtualMachineConfigSpec with appropriate contents
and run the ReconfigVM_Task to enable the iso.

DocImpact

Fixes LP# 1206584
Fixes BP vmware-config-drive-support

Change-Id: I1df1e61edbff9f3a68940d3e3e87fea3be838d11
Merge "VMware: Config Drive Support"