server: subscribe to topic with own name if router not nil (#1295)
server: subscribe to topic with own name if router not nil (#1295)

* server: subscribe to topic with own name if router not nil

Signed-off-by: Vasiliy Tolstov <c36af997645181f727020b1671b7c66b7a9c7a34@unistack.org>
myodc/go-micro,micro/go-micro