This is a pre-patch for adding a CRUD plugin for tea records.
This property contains only the UID of the owner FE user, but not
a relation to a FE user model. This is because we neither have nor
need a FE user model for the purposes of the CRUD plugin.
This now matches what the TYPO3 Core uses.
We still use the XLIFF 1.2 schema for validation as version 1.2
is the first fully ratified version.
Closes#198
