Clear system entries in known-hosts file

Resolves  openbmc/openbmc-test-automation#996

Change-Id: I7ecc4361788975dc985104eade782bc7583f3795
Signed-off-by: Vijay Kantanavar <vikantan@in.ibm.com>
diff --git a/tests/__init__.robot b/tests/__init__.robot
index 2ff43e2..c5c2f99 100644
--- a/tests/__init__.robot
+++ b/tests/__init__.robot
@@ -17,6 +17,7 @@
 
 System Driver Data
     [Documentation]  System driver information.
+    Run Keyword And Ignore Error  Clear System Entry From Knownhosts
     Open Connection And Log In
     Run Keyword And Ignore Error  Log BMC Driver Details
     Run Keyword And Ignore Error  Log PNOR Driver Details