*  Add panic if backgroundWorker fails

*  Use log.Panicf instead of panic

* adapt to new hive.go version

* upgrade hive.go

* use store backed sequence

* add option to use in-memory database

* address review comments

*  fix linter warnings

*  fix import order

* normalize global plugin vars

* throw the dog a bone

* remove unused logger in drng web api endpoint

* Add database plugin to call garbage collection and close DB on shutdown #284

* Adjust comment