DummySessionPersistence

DummySessionPersistence class is a derived class of ISessionPersistence used as a default implementation where session persistence is required but not yet implemented or needed. This class overrides two methods readSession and writeSession.

`readSession()`	Reads session data and takes a DiagnosticSessionControl parameter.
`writeSession()`	Writes session data and takes a DiagnosticSessionControl parameter.