Run dbus dos test as user

There is a session bus setup by systemd for the normal user, which is
the one all tests should use. Use that by simply running the test as
user user.

Fixes: https://phabricator.apertis.org/T1906



Reviewed-by: Luis Araujo <luis.araujo@collabora.co.uk>
Signed-off-by: Sjoerd Simons <sjoerd.simons@collabora.co.uk>
Differential Revision: https://phabricator.apertis.org/D3662

dbus/dbus-dos-reply-time.yaml

@@ -16,7 +16,7 @@ install:
 
 run:
   steps:
-    - common/run-test-in-systemd --basename --timeout=900 /usr/lib/apertis-tests/dbus/dos-reply-time/run-test.sh
+    - common/run-test-in-systemd --basename --user=user --timeout=900 /usr/lib/apertis-tests/dbus/dos-reply-time/run-test.sh
 
 parse:
   fixupdict: