Add validation check for SEL entry

Change-Id: I57a23cff36f54922e9faae4aa5984b543842eea8
Signed-off-by: George Keishing <gkeishin@in.ibm.com>
diff --git a/extended/test_error_log.robot b/extended/test_error_log.robot
index 7013304..0dcd691 100644
--- a/extended/test_error_log.robot
+++ b/extended/test_error_log.robot
@@ -238,6 +238,8 @@
     Create Test Error Log
 
     ${sel_list}=  Run IPMI Standard Command  sel list
+    Should Not Be Equal As Strings  ${sel_list}  SEL has no entries
+
     # Example of SEL List:
     # 4 | 04/21/2017 | 10:51:16 | System Event #0x01 | Undetermined system hardware failure | Asserted