Added cookie affinity filter

[emmdurin]

To duplicate cookies from a path to another

This filter can be used by adding it to a route :

  filters:
  - name: CookieAffinity
    args:
      name: cookieName
      from: /originalPath
      to: /destinationPath

[edevosc2c]

need reformat

[emmdurin]

need reformat

Yes, and cleaning of remaining commented code.