- Updated vmware/govmomi godep (Needs for vsan support)

- Fix unmount for vsanDatastore
- Add support for vsan datastore

vendor/github.com/vmware/govmomi/object/host_config_manager.go

@@ -120,3 +120,14 @@ func (m HostConfigManager) OptionManager(ctx context.Context) (*OptionManager, e
 
 	return NewOptionManager(m.c, *h.ConfigManager.AdvancedOption), nil
 }
+
+func (m HostConfigManager) ServiceSystem(ctx context.Context) (*HostServiceSystem, error) {
+	var h mo.HostSystem
+
+	err := m.Properties(ctx, m.Reference(), []string{"configManager.serviceSystem"}, &h)
+	if err != nil {
+		return nil, err
+	}
+
+	return NewHostServiceSystem(m.c, *h.ConfigManager.ServiceSystem), nil
+}