The root user tries to `sudo -u stack`, without a tty, causing fedora+devstack images builds to fail in Jenkins. Change-Id: Ia0a7fb315cf9bd17cf250e70dba06363a697c97c
Change-Id: I56611d1c2bf13c8d24a87869bf8334d8e4992f6f
Change-Id: I7d83bb2b359e7a8c3858eca04c96e35cf4e1fe9e