DeviceServer: use the module logger instead of the device logger.

The DeviceServer used the device logger because that was the only way
for its messages to appear on its device log file.  But now that the
device logs come from each Process, the DeviceServer can use its
module logger.

Author: carandraug

microscope/deviceserver.py

@@ -136,7 +136,7 @@ def clone(self):
 
     def run(self):
         cls_name = self._device_def['cls'].__name__
-        logger = logging.getLogger(cls_name)
+        logger = logging.getLogger(__name__)
 
         # If the multiprocessing start method is fork, the child
         # process gets a copy of the root logger.  The copy is