Add careSetting property to Order class - TRUNK-4156

TRUNK-4156-redesign. Introduce care_setting table
1. Introduce new care_setting table.
2. Replace existing care_setting varchar to care_setting_id referencing the care_setting table.
3. Make OUTPATIENT as default care_setting for existing orders that do not have a care_setting.
4. Introduce new method in OrderService. This fixes a test and provides a way to retrieve a care setting.

Minor documentation fix

TRUNK-4156 - Changes based on comments.

Made some changes as a follow up in update file - TRUNK-4156

Fixed test data, order and caresetting hbm files - TRUNK-4156