Collect more ESX information via vCenter

There are quite a few datasources that require direct access to ESXi hosts when the data is readily available in vCenter.  This is painful since establishing permissions to hosts in most environments is tricky at best (confirmed after extended testing done yesterday) and the documentation provided is not complete.  The problem is if you just point current DS definitions to vCenter (e.g., hardware), data is acquired, but the DS has no per-host data, it just grabs the data for one host and displays it in that subtree.