Enable Field Mode

Change-Id: Ic76ad98e4592ed5140cef468e6b2582aaef8a0b7
Signed-off-by: Sushil Singh <susilsi7@in.ibm.com>
diff --git a/redfish/update_service/test_redfish_signed_image_update.robot b/redfish/update_service/test_redfish_signed_image_update.robot
index fb2bc4e..e3153e2 100644
--- a/redfish/update_service/test_redfish_signed_image_update.robot
+++ b/redfish/update_service/test_redfish_signed_image_update.robot
@@ -62,6 +62,7 @@
     [Documentation]  Do the suite setup.
 
     Valid File Path  IMAGE_FILE_PATH
+    Enable Field Mode And Verify Unmount
     Redfish.Login
     Delete All BMC Dump
     Redfish Purge Event Log