This is a simple service on top of IDMStore and aaa-password-service, which provides a number of critical services:
org.opendaylight.aaa.api.IdMService org.opendaylight.aaa.api.ClaimCache org.opendaylight.aaa.api.CredentialAuth org.opendaylight.aaa.api.PasswordCredentialAuth
It is also used by downstreams, hence we want to make it OSGi DS for easier consumability.