GUI:Fix for user privilege list variable name

Changes:
    - In gui/gui_test/security_and_access_menu/test_user_management_sub_menu.robot
    - Fixed list variable name.

Tested: -Ran above test case from sandbox successfully.

Change-Id: I7c451d737177511a9f406e6a44739c38d6227043
Signed-off-by: Nandish-Matti <nandish.matti@ibm.com>
diff --git a/gui/gui_test/security_and_access_menu/test_user_management_sub_menu.robot b/gui/gui_test/security_and_access_menu/test_user_management_sub_menu.robot
index 4837671..9dd1b72 100644
--- a/gui/gui_test/security_and_access_menu/test_user_management_sub_menu.robot
+++ b/gui/gui_test/security_and_access_menu/test_user_management_sub_menu.robot
@@ -176,7 +176,7 @@
 
     # Get random username and user privilege level.
     ${username}=  Generate Random String  8  [LETTERS]
-    ${privilege_level}=  Evaluate  random.choice(${user_privilege_list})  random
+    ${privilege_level}=  Evaluate  random.choice(${list_user_privilege})  random
 
     # Create new user account.
     Create User And Verify  ${username}  ${privilege_level}  ${True}