Update vpd manager dependency list

The commit adds dependency for vpd-manager to start before RBMC
application.

This is required so that by the time RBMC app comes up, vpd-manager can
be ready with position interface defining position of the respective
BMC, which inturn is required by RBMC application for further
processings.

Change-Id: I721f74d56a71ea60557d188ccbe2e14b3428a1dc
Signed-off-by: Sunny Srivastava <sunnsr25@in.ibm.com>
diff --git a/service_files/vpd-manager.service b/service_files/vpd-manager.service
index 8c78781..17b34eb 100644
--- a/service_files/vpd-manager.service
+++ b/service_files/vpd-manager.service
@@ -9,6 +9,7 @@
 After=mapper-wait@-xyz-openbmc_project-state-chassis0.service
 After=set-spi-mux.service
 Before=phosphor-discover-system-state@0.service
+Before=xyz.openbmc_project.State.BMC.Redundancy.service
 
 [Service]
 BusName=com.ibm.VPD.Manager