mock auth_handler.fetch method to return identity in tests
mock auth_handler.fetch method to return identity in tests

felliott/waterbutler,rafaeldelucena/waterbutler,RCOSDP/waterbutler,rdhyee/waterbutler,TomBaxter/waterbutler,chrisseto/waterbutler,Ghalko/waterbutler,cosenal/waterbutler,CenterForOpenScience/waterbutler,kwierman/waterbutler,icereval/waterbutler,Johnetordoff/waterbutler,hmoco/waterbutler