This commit explicitly adds the dbus-tests package dependency for
the dbus-dos-reply-time test definition.

Reviewed-by: Philip Withnall <philip.withnall@collabora.co.uk>
Signed-off-by: Luis Araujo <luis.araujo@collabora.co.uk>
Differential Revision: https://phabricator.apertis.org/D4107