multiple parser per thing in configdb

Part of a multi MR change to setup the config db for multiple, time restricted thing parsers. See also:

After !252 (merged) all the relevant code lies in this repo. Thats why

• timeio-configdb-updater!7
• tsm-dispatcher!140

are obsolete. i, @bert.palm, manually moved the code from the mentioned MR here and will review ASAP.