Add test beamline params path in dummy devices (#1678)

* Set environment in system tests

* Fix

* Add test beamline params path in dummy devices

Author: jacob720

tests/system_tests/hyperion/supervisor/dummy_devices.py

@@ -1,4 +1,5 @@
 from dodal.common.beamlines.beamline_parameters import BEAMLINE_PARAMETER_PATHS
 
 BEAMLINE_PARAMETER_PATHS["i03"] = "tests/test_data/test_beamline_parameters.txt"
+BEAMLINE_PARAMETER_PATHS["test"] = "tests/test_data/test_beamline_parameters.txt"
 from dodal.beamlines.i03 import *  # type: ignore  # noqa: E402, F403