Enable FakeISISEventData doctest

MonitorLiveData now cancels more quickly so the tests should not fail

docs/source/algorithms/FakeISISEventDAE-v1.rst

@@ -25,10 +25,7 @@ Usage
 
 **Example:**
 
-.. This test is currently hanging on macOS as the MonitorLiveData algorithm
-   is taking a long time to cancel
-
-.. code-block:: python
+.. testcode:: exFakeISISEventDAE
 
     from threading import Thread
     import time