Adding debug logs to log if the registration response is null.

Signed-off-by: Jayanga Dissanayake <jsdjayanga@yahoo.com>
Meking message fields private.

Signed-off-by: Jayanga Dissanayake <jsdjayanga@yahoo.com>
Adding getter and setters for tokens

Signed-off-by: Jayanga Dissanayake <jsdjayanga@yahoo.com>
Making OperationCenterAgent available for other classes.

Signed-off-by: Jayanga Dissanayake <jsdjayanga@yahoo.com>
Addign command functionality, basic implementation.

Signed-off-by: Jayanga Dissanayake <jsdjayanga@yahoo.com>