CORD-3005 update app_label for vOLT

Change-Id: I7fa4568a3dfe19f9db5ddc38f0f9826d513f0896
diff --git a/xos/synchronizer/models/volt.xproto b/xos/synchronizer/models/volt.xproto
index e1f5ddf..1adbde2 100644
--- a/xos/synchronizer/models/volt.xproto
+++ b/xos/synchronizer/models/volt.xproto
@@ -1,4 +1,5 @@
 option name = "volt";
+option app_label = "volt";
 
 message VOLTService (Service){
      option verbose_name = "vOLT Service";