HawkBit 0.3.0M8 uploaded to candidate channel

Hello snappers!

I’ve updated the hawkbit snap the latest tagged milestone, 0.3.0M8. Apart from the slew of new features, there have been updates to the database model and runtime mode of H2 (from “mysql” compatibility to the “legacy”). Local testing on blank slate systems shows that it is running fine, but I will wait a little longer before pushing it to stable.