test: assume motd permissions work on debian-testing
test: assume motd permissions work on debian-testing

Our incoming debian-testing update has a new pam (1.4.0-13 -> 1.5.2-2)
which now supports checking the permissions of the motd files, and thus
properly elides displaying the message about how to enable cockpit for
non-administrator users.

cockpit-project/cockpit,martinpitt/cockpit,martinpitt/cockpit,martinpitt/cockpit,martinpitt/cockpit,martinpitt/cockpit,cockpit-project/cockpit,cockpit-project/cockpit,cockpit-project/cockpit,cockpit-project/cockpit