tests: Use new auth API in the torture_auth test.
tests: Use new auth API in the torture_auth test.

taikoo/libssh,taikoo/libssh,nviennot/libssh,mwgoldsmith/ssh,sebadoom/libssh,mwgoldsmith/ssh,taikoo/libssh,DouglasHeriot/libssh,mwgoldsmith/libssh,wangshawn/libssh,kedazo/libssh,robxu9/libssh,wangshawn/libssh,mwgoldsmith/ssh,Distrotech/libssh,DouglasHeriot/libssh,elastichosts/libssh,pouete/libssh,nviennot/libssh,wangshawn/libssh,nviennot/libssh,kedazo/libssh,robxu9/libssh,pouete/libssh,robxu9/libssh,elastichosts/libssh,robxu9/libssh,mwgoldsmith/libssh,nviennot/libssh,Distrotech/libssh,taikoo/libssh,Distrotech/libssh,wangshawn/libssh,pouete/libssh,mwgoldsmith/ssh,DouglasHeriot/libssh,mwgoldsmith/libssh,DouglasHeriot/libssh,elastichosts/libssh,sebadoom/libssh,kedazo/libssh,mwgoldsmith/libssh,pouete/libssh,sebadoom/libssh,sebadoom/libssh,kedazo/libssh,Distrotech/libssh