Adding support for EBS-datavolume in Tier and Standalone

Also:
* Finally a proper cleanup for the EBS secondary volume and databag
* Update Berksfile to aws 2.3.0 and start checking in Berksfile.lock
* OC-11297 work

Yes, I added logic to `private-chef::drbd` so that it can be run for standalone/tier-backends for secondary EBS volumes, but not otherwise.

At this point the recipe name `drbd` makes no sense at all