update plugin for hapi 8.0.0 api

`onPostHandler` callback should return `reply.continue()` instead of calling `next()` callback


Should use connection's routing table ( i.e. `request.connection.table()` ) instead of server's ( `request.server.table()` ). 
From hapi 8.0.0 `request.server.table()` will return array of all connections' routing table which breaks plugin's functionality