Restructure project modules and improve configuration

[andrewflbarnes]

• Moved all database modules into a parent database module
• Renamed modules and packages for more sense/consistency
• Minor improvements to pom config for tests against DBs
• Added docker-compose.yml for starting postgres for ITs and local testing

[andrewflbarnes]

Reorder GAV as at the moment it is AGV

[andrewflbarnes]

Readme.md requires updating because of project name changes for sonarcloud