Added teardown method to delete certificate

Change-Id: I77a20586856b97a4578fbede2086b31a9e69eba8
Signed-off-by: Rahul Maheshwari <rahulmaheshwari@in.ibm.com>
diff --git a/test_lists/witherspoon/regression_bucket b/test_lists/witherspoon/regression_bucket
index 5933659..e3247d4 100644
--- a/test_lists/witherspoon/regression_bucket
+++ b/test_lists/witherspoon/regression_bucket
@@ -196,3 +196,14 @@
 -i Check_Number_Of_Fans_With_Power_On
 -i Check_Number_Of_Fan_Monitors_With_Power_On
 -i Check_Fan_Speed
+# Certificate
+-i Test_Server_Certificate_Install_With_Valid_Certificate_And_Valid_Private_Key
+-i Test_Server_Certificate_Install_With_Empty_Certificate_And_Valid_Private_Key
+-i Test_Server_Certificate_Install_With_Valid_Certificate_And_Empty_Private_Key
+-i Test_Server_Certificate_Install_With_Empty_Certificate_And_Empty_Private_Key
+-i Test_Client_Certificate_Install_With_Valid_Certificate_And_Valid_Private_Key
+-i Test_Client_Certificate_Install_With_Empty_Certificate_And_Valid_Private_Key
+-i Test_Client_Certificate_Install_With_Valid_Certificate_And_Empty_Private_Key
+-i Test_Client_Certificate_Install_With_Empty_Certificate_And_Empty_Private_Key
+-i Test_Delete_Server_Certificate
+-i Test_Delete_Client_Certificate