config_tempest: import tempest(_lib).auth, .config
config_tempest: import tempest(_lib).auth, .config

tempest.auth is now in tempest_lib
also tempest.config import was missing

Change-Id: I4b0c0a1fa797750a766039cadfe81ab7b145b078

danielmellado/tempest,eggmaster/tempest,eggmaster/tempest,danielmellado/tempest