REDFISH: NoAccess privilege has been removed from Redfish script

Changes:
- NoAccess privilege has been removed completely from the Community stack as per this discussion - https://gerrit.openbmc.org/c/openbmc/bmcweb/+/52365
.
- Removed NoAccess privilege from redfish/account_service/test_ipmi_redfish_user.robot and redfish/account_service/test_ldap_configuration.robot

Tested:
- Ran redfish/account_service/test_ipmi_redfish_user.robot and redfish/account_service/test_ldap_configuration.robot scripts successfully.

Change-Id: Iaa09599650a75ccf1207923fdbf744b6764ce8d9
Signed-off-by: KothaiSrini <kothais@ami.com>
diff --git a/redfish/account_service/test_ipmi_redfish_user.robot b/redfish/account_service/test_ipmi_redfish_user.robot
index 7f90dcb..02a95c9 100644
--- a/redfish/account_service/test_ipmi_redfish_user.robot
+++ b/redfish/account_service/test_ipmi_redfish_user.robot
@@ -254,7 +254,7 @@
     # Verify new user privilege level via Redfish.
     ${privilege}=  Redfish_Utils.Get Attribute
     ...  /redfish/v1/AccountService/Accounts/${username}  RoleId
-    Valid Value  privilege  ['NoAccess']
+    Valid Value  privilege  ['ReadOnly']
 
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