CreateChildDisk 6.7 support (#926)
CreateChildDisk 6.7 support (#926)

Handle method response namespace change in 6.7
dougm/govmomi,dougm/govmomi,bruceadowns/govmomi,vmware/govmomi,vmware/govmomi,bruceadowns/govmomi,bruceadowns/govmomi,dougm/govmomi,vmware/govmomi