Retry initial connection attempt should it fail (#1335)

Sometimes the initial selected node could fail. In that case, we'll give it a few more attempts to locate a media node for the session instead of failing it after the first try.

(cherry picked from commit 2fa46e2df4)

pkg/routing/interfaces.go

@@ -16,6 +16,7 @@ import (
 
 // MessageSink is an abstraction for writing protobuf messages and having them read by a MessageSource,
 // potentially on a different node via a transport
+//
 //counterfeiter:generate . MessageSink
 type MessageSink interface {
 	WriteMessage(msg proto.Message) error
@@ -57,6 +58,7 @@ type RTCMessageCallback func(
 )
 
 // Router allows multiple nodes to coordinate the participant session
+//
 //counterfeiter:generate . Router
 type Router interface {
 	MessageRouter