AES Power restore policy

The power restore feature was introduced recently and we have seen
system code with old and stable driver releases where it doesn't
work. This failure causes AES to bring system into maintenance mode
while the system is already at standby and online.

The best option here is to ignore if it doesnt work and also doesn't
impact as it is set at the end of the AES standby process.

Change-Id: I8e04a1df6da00bc53d2b2b03414a7b48a3eaea40
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/extended/standby_bmc.robot b/extended/standby_bmc.robot
index af654f8..798e0de 100644
--- a/extended/standby_bmc.robot
+++ b/extended/standby_bmc.robot
@@ -47,7 +47,8 @@
     Run Keyword If  '${l_ready}' == '${False}'
     ...    Initiate Power Off
 
-    Update Policy Setting   RESTORE_LAST_STATE
+    Run Keyword And Ignore Error
+    ...   Update Policy Setting   RESTORE_LAST_STATE
 
 
 *** Keywords ***