[bin/agent] Added virtualization detection to agent

bin/agent

@@ -80,21 +80,39 @@ class NodeAgent
     }
   end
 
+  def _is_virtual
+    begin
+      if @os["virtualization"]["role"] == "guest"
+        return true
+      end
+    rescue
+    end
+    return false
+  end
+
   def _manufacturer
+    if _is_virtual
+      return @os["virtualization"]["system"].upcase
+    else
       begin
         return @os[:dmi][:system][:manufacturer]
       rescue
         return "Unknown"
       end
     end
+  end
 
   def _product_name
+    if _is_virtual
+      return @os["virtualization"]["role"]
+    else
       begin
         return @os[:dmi][:system][:product_name]
       rescue
         return "Unknown"
       end
     end
+  end
 
   def _serial
     begin