More cleaning of known hosts file needed

orchestrate.py

@@ -105,6 +105,7 @@ if 'init' in args.actions:
     ]
     for ip in hosts.values():
         commands += [
+            ['ssh-keygen', '-R', ip],
             ['ssh', '-o', 'ForwardAgent=yes', '-o', 'ProxyCommand=ssh -W %s:22 -q %s@%s' %
              (ip, user, master_ip), '-o', 'StrictHostKeyChecking=no', '%s@%s' % (user, ip), ':']
         ]