IPMI: Modified Verify Disabling IPMI Via OOB IPMI testcase in test_ipmi_disable.robot

Changes:
  - Modified Verify Disabling IPMI Via OOB IPMI testcase to handle empty and successfull response

Tested:
  - Ran ipmi/test_ipmi_disable.robot

Change-Id: Ib0434179a62dcdda2448b630e28a83fd41128749
Signed-off-by: Ishwarya Mathi M <ishwaryamm@ami.com>
diff --git a/ipmi/test_ipmi_disable.robot b/ipmi/test_ipmi_disable.robot
index c97573e..d19073c 100644
--- a/ipmi/test_ipmi_disable.robot
+++ b/ipmi/test_ipmi_disable.robot
@@ -36,8 +36,8 @@
     ...  AND  Run Inband IPMI Standard Command  lan set ${CHANNEL_NUMBER} access on
 
     # Disable IPMI via OOB IPMI and verify
-    Run Keyword and Expect Error  *IPMI response is NULL*
-    ...  Run IPMI Standard Command  lan set ${CHANNEL_NUMBER} access off
+    ${resp}=  Run Keyword and Ignore Error  Run External IPMI Standard Command  lan set ${CHANNEL_NUMBER} access off
+    Should Contain any  ${resp}  ${EMPTY}  Set Channel Access for channel ${CHANNEL_NUMBER} was successful.
     Run Keyword and Expect Error  *Unable to establish IPMI*
     ...  Run External IPMI Standard Command  lan print ${CHANNEL_NUMBER}