Mention that either there are no registered or enabled agents during
vPoller Worker startup
By default the vpoller-client sends requests to tcp://localhost:10123 endpoint
The client should be receiving result in JSON format
Add 'vm.datastore.discover' method for discovering all datastores used
by all Virtual Machines
Add 'vm.datastore.get' method for getting all datastores used by a
specific VirtualMachine managed object