Add Redfish Delete dump for clean up robot script

Change-Id: I3e7959020da4a57a6f76416bf2b4a98cf84674b1
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/extended/standby_bmc.robot b/extended/standby_bmc.robot
index f86e2c1..266c492 100644
--- a/extended/standby_bmc.robot
+++ b/extended/standby_bmc.robot
@@ -73,6 +73,7 @@
     Run Keyword And Ignore Error  Delete All Error Logs
     Run Keyword And Ignore Error  Redfish Purge Event Log
     Run Keyword And Ignore Error  Delete All Dumps
+    Run Keyword And Ignore Error  Redfish Delete All BMC Dumps
     Run Keyword And Ignore Error  Delete All Redfish Sessions
     Check For Current Boot Application Failures