Removing locking in Vert.x router

[stuartwdouglas]

The Vert.X RouteImpl classes uses locking, this needs to be removed and replaced with some kind of Copy on Write strategy.

[cescoffier]

Work in progress on the Vert.x: vert-x3/vertx-web#1408

[dufoli]

#1408 is merged so maybe this issue has to be closed ?