dbus-installed-tests: re-enable test-dbus-daemon test

The test issue ended up being a dbus packaging issue
and should be sorted now.

Signed-off-by: Andre Moreira Magalhaes (andrunko) <andre.magalhaes@collabora.co.uk>

dbus/installed-tests.sh

 #!/bin/sh
 
-# List of tests to skip:
-# - test-dbus-daemon is known to fail due to some hard limits set in the dbus
-#   configuration, so lets skip it for now
-SKIP_TESTS="test-dbus-daemon"
+# List of tests to skip (basename):
+SKIP_TESTS=""
 
 set -e