Fix broken tests due to pytest-asyncio update (#1246)

Author: DominicOram

tests/common/beamlines/test_beamline_utils.py

@@ -19,7 +19,8 @@
 
 
 @pytest.fixture(autouse=True)
-def flush_event_loop_on_finish(event_loop):
+def flush_event_loop_on_finish():
+    event_loop = asyncio.get_event_loop()
     # wait for the test function to complete
     yield None
 

tests/devices/unit_tests/i03/test_undulator_dcm.py

@@ -16,7 +16,8 @@
 
 
 @pytest.fixture(autouse=True)
-def flush_event_loop_on_finish(event_loop):
+def flush_event_loop_on_finish():
+    event_loop = asyncio.get_event_loop()
     # wait for the test function to complete
     yield None