Task #8437: Minor cleanup, fixed typo

MAC/Services/test/methodtrigger.py

 from threading import Lock, Condition
 
+__all__ = ["MethodTrigger"]
+
 class MethodTrigger:
   """
     Set a flag when a specific method is called, possibly asynchronously. Caller can wait on this flag.

MAC/Services/test/tPipelineStarter.py

@@ -6,7 +6,7 @@ import sys
 
 import lofar.mac.PipelineStarter as module
 from lofar.sas.otdb.OTDBBusListener import OTDBBusListener
-from lofar.messaging import ToBus, Service, EventMessagea
+from lofar.messaging import ToBus, Service, EventMessage
 
 from methodtrigger import MethodTrigger