redfish: use Redfish Delete All BMC Dumps instead

Signed-off-by: Joseph Liu <kwliu@nuvoton.com>
Signed-off-by: Tim Lee <timlee660101@gmail.com>
Change-Id: I29c6ba95e8b005543069fc2d541fadc1b895b3ea
diff --git a/redfish/update_service/test_redfish_bmc_code_update.robot b/redfish/update_service/test_redfish_bmc_code_update.robot
index 6112949..55ae95e 100644
--- a/redfish/update_service/test_redfish_bmc_code_update.robot
+++ b/redfish/update_service/test_redfish_bmc_code_update.robot
@@ -107,7 +107,7 @@
 
     Valid File Path  IMAGE_FILE_PATH
     Redfish.Login
-    Delete All BMC Dump
+    Redfish Delete All BMC Dumps
     Redfish Purge Event Log