MIFOSX-1722: Extend client service to handle identifiers
completed by: Mohammed Nafees
mentors: Markus
Extends the client service to handle identifiers.
This includes:
- Create an identifier
- Retrieve all identifiers
- Retrieve specific identifier
- Update an identifier
- Delete an identifier
Provide unit tests.
https://mifosforge.jira.com/browse/MIFOSX-1722