Update BMC reboot to choose boot normal stack mode

Change-Id: I057ee215ba76cfd03f45c2c118bb0d2879f9622e
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/lib/code_update_utils.robot b/lib/code_update_utils.robot
index 886edaa..fbd68b8 100644
--- a/lib/code_update_utils.robot
+++ b/lib/code_update_utils.robot
@@ -405,7 +405,7 @@
 
     BMC Execute Command  /sbin/fw_setenv fieldmode
     BMC Execute Command  /bin/systemctl unmask usr-local.mount
-    OBMC Reboot (off)  quiet=${1}
+    OBMC Reboot (off)  stack_mode=normal
     BMC Execute Command  [ -d "/usr/local/share" ]