Add service configurations for db8 mediadb/tempdb

db8 now only serves one database per process and therefor we have to start all three
databases (main, media, temp) as separate service object.

Signed-off-by: Simon Busch <morphis@gravedo.de>
Remove old --pmloglib argument from ls-hubd services

Signed-off-by: Simon Busch <morphis@gravedo.de>