Use either esxi:dc,host OR cluster,resource_pool
Use either esxi:dc,host OR cluster,resource_pool

vsphere_guest now can deploy a template using a datacenter and hostname
as the target, instead of requiring a cluster and resource_pool.

This commit fixes #951.

Signed-off-by: Vyronas Tsingaras <64b96c8e9de4e32468620d31d9013f7fd48d550d@it.auth.gr>

thaim/ansible,thaim/ansible