fix bug in token server side
fix bug in token server side

when auth set to none, token server side should NOT try to open
token file again.
fix bug:1759448

Change-Id: I56739ca5c4a6c6d4c8b1f6c27c8205394a68a4ea

mfcloud/python-zvm-sdk,mfcloud/python-zvm-sdk,mfcloud/python-zvm-sdk,mfcloud/python-zvm-sdk