IPMI: For test_ipmi_sel_time.robot added Sleep time in Create SEL keyword in ipmi_client.robot

Changes:
    - In ipmi_client.robot added Sleep 5s in Create SEL keyword. While executing sel elist command it takes 4 to 5 secs to display the event, hence added
      sleep time in Create SEL keyword
Tested:
    - Ran ipmi/test_ipmi_sel_time.robot script Successfully

Change-Id: I1a97a2a88772e2872c1c175ac6cfe966d7a8469a
Signed-off-by: manimozhik <manimozhik@ami.com>
diff --git a/lib/ipmi_client.robot b/lib/ipmi_client.robot
index 8328089..6bc928c 100755
--- a/lib/ipmi_client.robot
+++ b/lib/ipmi_client.robot
@@ -502,6 +502,8 @@
 
     Should Not Contain  ${resp}  00 00  msg=SEL not created.
 
+    Sleep  5s
+
     [Return]  ${resp}