Change default loglevel

ThreadLogHandler should default to INFO, so that it logs informational
messages from tasks.

Author: rwb27

labthings/core/tasks/thread.py

@@ -130,7 +130,7 @@ def terminate(self):
 
 
 class ThreadLogHandler(logging.Handler):
-    def __init__(self, thread=None, dest=None, level=logging.WARNING):
+    def __init__(self, thread=None, dest=None, level=logging.INFO):
         """Set up a log handler that appends messages to a list.
 
         This log handler will first filter by ``thread``, if one is