Midway odm

Preparing the ground for the ODM seeds ;)

Bug fix: [no]
Feature addition: [no]
Backwards compatibility break: [yes] Group goes back to Entity
Unit test passes: [yes]
Behat scenarios passes: [yes]
Checkstyle issues: [no]
ChangeLog updated: [no]
Documentation PR: [NA]
Fixes the following jira: Not applicable