update_db instead of clean_db; clean file for each DBs

* clean_db shall be called by itself as it do not check schema stamps
* separate clean files shall be used, as clean checks if col.ns files is present
fix clean_db with cols named differently than *_db

now database name is taken as the token before first _, consistently with update db
clean each collection separately in inputvals

(as currently update_db require clean to be present)
Merge branch 'kws_deploy' of github.com:vidma/deployment into kws_deploy