BIOS progress code at when host is powered off

Changes:
     - There shouldn't be any BIOS progress code when host
       is powering off. Updated code check to handle.

Tested:
    - Ran from sandbox and check without booting to OS.

Change-Id: Icc29c85c1a09d16a5b2b8be4184f4400f9062d21
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/redfish/systems/LogServices/test_post_codes.robot b/redfish/systems/LogServices/test_post_codes.robot
index a620876..6585ec3 100644
--- a/redfish/systems/LogServices/test_post_codes.robot
+++ b/redfish/systems/LogServices/test_post_codes.robot
@@ -65,7 +65,8 @@
     ${post_codes}=  Redfish.Get Properties
     ...  /redfish/v1/Systems/system/LogServices/PostCodes/Entries
     Log To Console  BIOS POST Codes count: ${post_codes['Members@odata.count']}
-    Should Be True  ${post_codes['Members@odata.count']} >= 1  msg=No BIOS POST Codes populated.
+    Should Be True  ${post_codes['Members@odata.count']} == 0
+    ...  msg=BIOS POST Codes populated.
 
 
 Test PostCode Id Value Incremented On Host Reboot