Set back the default INFO logging at one place, but only if the user didn't specify one.

theano/gof/compilelock.py

@@ -11,6 +11,10 @@ import logging
 from theano import config
 
 _logger = logging.getLogger("theano.gof.compilelock")
+# If the user provided a logging level, we don't want to override it.
+if _logger.level == logging.NOTSET:
+    # INFO will show the the messages "Refreshing lock" message
+    _logger.setLevel(logging.INFO)
 
 # In seconds, time that a process will wait before deciding to override an
 # existing lock. An override only happens when the existing lock is held by