Because we test for the other properties in the schema.
Also sets `additionalProperties` to `False` so we’re forced to update
the schemas if we make similar changes in the future. This means
removing `created_by` from the test data because it’s not returned by
the real response.
The use for the public template API is for building caseworking systems
or similar, where you might need a list of templates to pick from (ie
instead of using the Notify web interface to pick from and send a
message).
Right now our API isn’t returning the template name as part of the
response. The name is a useful, human-friendly way of identifying a
template.
This commit changes the response to include the name.
Some clients will need updating before this can be useful.
