appiumtests: unown name after objects are unregistered
This tries to fix a race:
gi.repository.GLib.GError: g-io-error-quark: An object is already exported for the interface org.freedesktop.DBus.Properties at /org/mpris/MediaPlayer2
This tries to fix a race:
gi.repository.GLib.GError: g-io-error-quark: An object is already exported for the interface org.freedesktop.DBus.Properties at /org/mpris/MediaPlayer2