Get serial console working on Fedora and add TUI configuration

Previously, the serial console options for the installer did not
work as ovirt-firstboot explicitly used TTY1. Change it to use
/dev/console instead, and present TUI options for users to set
the console path.

Change-Id: Id99623830b56b77815196c8b0d153c86d3704f00
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=966302
Signed-off-by: Ryan Barry <rbarry@redhat.com>