GUI: Fix for 'Verify Host Orderly Reboot'

Changes :-
    - In gui/gui_test/operations_menu/test_server_power_operations_sub_menu.robot
    - Added delay for confirm button to appear.

Tested: -
    -  Verify_Host_Orderly_Reboot
Change-Id: Ie69bc34a13e1b2824861cddbdedf696291af9ee3
Signed-off-by: Nandish-Matti <nandish.matti@ibm.com>
diff --git a/gui/gui_test/operations_menu/test_server_power_operations_sub_menu.robot b/gui/gui_test/operations_menu/test_server_power_operations_sub_menu.robot
index c8ae12e..83fce6b 100644
--- a/gui/gui_test/operations_menu/test_server_power_operations_sub_menu.robot
+++ b/gui/gui_test/operations_menu/test_server_power_operations_sub_menu.robot
@@ -141,6 +141,8 @@
     ...  AND  Navigate to Server Power Operation Page
 
     Click Element  ${xpath_reboot_button}
+    # Delay for confirm button to appear.
+    Sleep  5s
     Wait Until Element Is Visible  ${xpath_confirm_button}  timeout=10
     Click Element  ${xpath_confirm_button}
     Wait Until Keyword Succeeds  2 min  1 sec  Is Server Status Off