Multi Schema services for central instance

The following document helps to make multi-environment applications (Services which will run in digit namespace but store its data in state-specific namespaces of DB based on tenant-id) central instance compatible. These services include the likes of

1. Property-services

2. TL-services

3. PGR-services

4. Billing-service

5. Collection-service

Any service that needs to share its data among multiple DB schemas can be added to the above category.