Update power policy from RESTORE_LAST_STATE to ALWAYS_POWER_OFF

ALWAYS_POWER_OFF is the current default policy.

Resolves  openbmc/openbmc-test-automation#1162

Change-Id: I7978afd38c46fb365d7c90cd6d276249cb576cc7
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/tests/ipmi/test_chassis.robot b/tests/ipmi/test_chassis.robot
index a3736ed..f129078 100755
--- a/tests/ipmi/test_chassis.robot
+++ b/tests/ipmi/test_chassis.robot
@@ -84,6 +84,6 @@
 Test Exit Logs
     [Documentation]    Log FFDC if test failed.
 
-    Set BMC Power Policy  ${RESTORE_LAST_STATE}
+    Set BMC Power Policy  ${ALWAYS_POWER_OFF}
 
     FFDC On Test Case Fail