Ensure correct cinder dir is written to tgt config

The wrong directory was being placed in the tgtd config.

This change will allow https://review.openstack.org/13633 to gate.

Change-Id: Icbf7b5ecc9bc53ccc2aed0cacb9f5f61abe8f882
diff --git a/lib/cinder b/lib/cinder
index 14c2df8..08c840e 100644
--- a/lib/cinder
+++ b/lib/cinder
@@ -208,7 +208,7 @@
         if [[ "$os_PACKAGE" = "deb" ]]; then
             _configure_tgt_for_config_d
             if [[ ! -f /etc/tgt/conf.d/cinder.conf ]]; then
-               echo "include $CINDER_DIR/volumes/*" | sudo tee /etc/tgt/conf.d/cinder.conf
+               echo "include $CINDER_STATE_PATH/volumes/*" | sudo tee /etc/tgt/conf.d/cinder.conf
             fi
             # tgt in oneiric doesn't restart properly if tgtd isn't running
             # do it in two steps