Make sure downloaders and providers match

couchpotato/core/downloaders/base.py

couchpotato/core/downloaders/blackhole/main.py

couchpotato/core/downloaders/nzbget/main.py

couchpotato/core/downloaders/nzbvortex/main.py

couchpotato/core/downloaders/pneumatic/main.py

couchpotato/core/downloaders/sabnzbd/main.py

couchpotato/core/downloaders/synology/main.py

couchpotato/core/downloaders/transmission/main.py

couchpotato/core/downloaders/utorrent/main.py

couchpotato/core/event.py

couchpotato/core/plugins/searcher/main.py

couchpotato/core/providers/base.py

couchpotato/core/providers/nzb/newznab/main.py