Reuse grpc clinet connection in grpc clinet lib

As of now when there is grpc disconnect between core and adapters , the connection is tried back with backoff and once the connection is reastablished there is a new redail done on the GRPC which is not required.  As we have now retries implemented in the grpc library , redailing the GRPC will change the clinet handlers and all the retrying grpc connections will be fail.

Reusing the same grpc clinet connection would keep the retires intact. this wouldnt need a redail