gssapi: Use GSSAPIClientIdentity to acquire creds
gssapi: Use GSSAPIClientIdentity to acquire creds

Signed-off-by: Simo Sorce <65f99581a93cf30dafc32b5c178edc6b0294a07f@redhat.com>
Reviewed-by: Andreas Schneider <5be00ddc76278cf6077f5047ca3384a88460c671@cryptomilk.org>

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