This patch adds a request list_virtual_machines which is responsible for
making an API connection and returning a raw "response" object from the
API.
Model instances of a Server (compute resource) are returned as a
collection through the "all" method. The Fog framework calls all on the
instance of the collection.
Without this patch, no actual API calls are being made through the Fog
layer to the underlying rbvmobi later and ultimately to the vSphere
target API.
This patch adds a simple current_time request which is similar to a
"ping" The layers and API are exercised fully using this simple API
call to retrieve the current time on the remote system.
This provides:
>> Fog::Compute[:vsphere].current_time
Tue Aug 30 20:46:27 UTC 2011
>> Fog::Compute[:vsphere].requests
[:current_time]
