add versioning to identity; add generic 'client' function
diff --git a/openstack/compute/servers/client.go b/openstack/compute/servers/client.go
index 3ce6965..611ff22 100644
--- a/openstack/compute/servers/client.go
+++ b/openstack/compute/servers/client.go
@@ -2,7 +2,7 @@
 
 import (
 	"fmt"
-	"github.com/rackspace/gophercloud/openstack/identity"
+	identity "github.com/rackspace/gophercloud/openstack/identity/v2"
 )
 
 // Client abstracts the connection information needed to make API requests for OpenStack compute endpoints.