vSphere Provider: Mapping out the Next Steps

Problem

Wanted to kick off a higher level discussion of what needs to be done on the vSphere provider and in what order. - What are the important missing resources? - Are there any enhancements that need to be made to the existing functionality? - What do we need to do to ensure the provider works with all common versions of vSphere in the wild? Pinging @tkak and @mkuzmin to chime in as well as anybody else with interest/knowledge in the community.