bug: Unable to transfer RBT between DIDs belonging to the same Node server

[arnabghose997]

When trying to send RBT between DIDs that are present on the same server, we face an error suggesting invalid address. The cause of this error is that we attempt to fetch the Peer ID of the receiver DID from DIDPeerTable. Since, there are no records present in this table for receiver, we get the invalid address error.

An additional check has to kept, where we need to also check DIDTable of the same node where the receiver DID is created and see if the record is present or not. If present, proceed normally else throw an error.