Fixed several errors in the arec preprocessor

* renamed the 'data' dict to 'arec_data' and made sure all references are consistent
* switched the recorder identifier from hostname to description, because there was a wild \n in the hostname for unknown reasons
* removed timezone awareness from starttime and endtime to make them compatible with times loaded from daisy

pipeline/preprocessors/arec.py

@@ -38,18 +38,18 @@ class ArecProcessor(Preprocessor):
         if not upload_dir.exists():
             raise ValueError('Specified upload_dir does not exist.')
 
-        data = self._parse_arec_json(upload_dir)
+        arec_data = self._parse_arec_json(upload_dir)
         required_strings = ['Title',
-                            'Device_hostname']
+                            'Device_description']
         required_datetimes = ['Start_time',
                               'End_time']
-        for key in required_keys + required_datetimes:
-            if key not in data:
+        for key in required_strings + required_datetimes:
+            if key not in arec_data:
                 raise KeyError(f'{key} missing from arec json file.')
 
         for key in required_datetimes:
             # Will throw an exception if the format is invalid
-            datetime.fromisoformat(data[key])
+            datetime.fromisoformat(arec_data[key])
 
         return True
 
@@ -58,11 +58,13 @@ class ArecProcessor(Preprocessor):
         queueitem = job['queueitem']
         upload_dir = Path(queueitem['upload_dir'])
         arec_data = self._parse_arec_json(upload_dir)
-        raw_title = data['Title']
-        recorder = data['Device_hostname']
+        raw_title = arec_data['Title']
+        recorder = arec_data['Device_description']
         room_id = self.config[recorder]
-        starttime = datetime.fromisoformat(data['Start_time']).timestamp()
-        endtime = datetime.fromisoformat(data['End_time']).timestamp()
+        starttime_tz = datetime.fromisoformat(arec_data['Start_time'])
+        starttime = starttime_tz.replace(tzinfo=None)
+        endtime_tz = datetime.fromisoformat(arec_data['End_time'])
+        endtime = endtime_tz.replace(tzinfo=None)
 
         outspec = self._init_jobspec(upload_dir,
                                      starttime,