Extending the Redfish Credential protocol to allow Redfish Clients
to be registered/unregistered for tracking their end of work
and delete a bootstrap account when all registered Redfish clients
finish their communication with Redfish service.
Redfish Http module also was updated to register/unregister clients
on Redfish Service creation/stop event.
Cc: Abner Chang <abner.chang@amd.com>
Cc: Nickle Wang <nicklew@nvidia.com>
Signed-off-by: Igor Kulchytskyy <igork@ami.com>
