apply bridge pattern under app/services/location directory. class csbs.py, jhu.py, nyt.py implements the interface DataSourcesInterface in sourcelocations.py. Add BasicLocationService class to implement the LocationService class. LocationService class in __init__.py get a new constructor method. And apply BasicLocationService in app/data/__init__.py

Author: JoyBiao

app/services/location/basiclocationservice.py

@@ -6,7 +6,6 @@ class BasicLocationService(LocationService):
     """
     Service for retrieving locations from csbs
     """
-
     async def get_all(self):
         # Get the locations.
         locations = await self.dataSource.get_locations()