CareSetting uuids are invalid

Both Care Settings in 1.10.x have the same uuid '6f0c9a92-6f24-11e3-af88-005056821db0'. This is a sign of two problems:

1. UUIDs should, by their name, by universally unique.
2. care_setting.uuid should be a unique attribute, so the database can help ensure that mistakes like this are never made.