Use dev version of volt service for now

Change-Id: Ic3d97aa8f143262a5b7fdf2649e1ed0e51a2e730
diff --git a/configs/seba-ponsim-voltha-1.7.yaml b/configs/seba-ponsim-voltha-1.7.yaml
index 86b3d5e..337c3a9 100644
--- a/configs/seba-ponsim-voltha-1.7.yaml
+++ b/configs/seba-ponsim-voltha-1.7.yaml
@@ -61,6 +61,9 @@
 rcord:
   image:
     tag: 'master'
+volt:
+  image:
+    tag: 'master'
 
 
 # in workflow/att-workflow service chart