Added index counter to cinder_openiscsi_service state name

It solve case with duplicate state ID in case more than one lvm backend.

Change-Id: I2eb00f3c2899544ee1859ab4c43e7233259a6de5
Related-Prod: PROD-31390
diff --git a/cinder/volume.sls b/cinder/volume.sls
index f1d5b93..1f72adf 100644
--- a/cinder/volume.sls
+++ b/cinder/volume.sls
@@ -223,7 +223,7 @@
   - require:
     - pkg: cinder_volume_packages
 
-cinder_openiscsi_service:
+cinder_openiscsi_service_{{ backend_name }}:
   service.running:
   - names: {{ volume.openiscsi_services }}
   - enable: true