[kube-router] hairpin mode misses configuration in cni-conf.json

[Alexandre Buisine]

while enable hairpinMode, a field must be added to the cni-conf.json :

  cni-conf.json: |
    {
       "cniVersion":"0.3.0",
       "name":"mynet",
       "plugins":[
          {
             "name":"kubernetes",
             "type":"bridge",
             "bridge":"kube-bridge",
             "isDefaultGateway":true,
             "hairpinMode":true,
             "ipam":{
                "type":"host-local"
             }
          }
       ]
    }

[Antoine Millet]

Also I need to add settings for hostports.