test: Relax expected D-Bus error message
test: Relax expected D-Bus error message

On Fedora Rawhide, the message now looks like this:

    cockpit-session: Failed to map certificate to user: [org.freedesktop.DBus.Error.NameHasNoOwner] Could not activate remote peer: activation request failed: unit is masked.

Relax the pattern to accept this as well.

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