400 status when _plugin/kibana/api/v1/multitenancy/tenant

[juanxhos]

Hi,

proxy works almost great except for this

{"request":{},"response":{},"body":{"statusCode":400,"error":"Bad Request","message":"Invalid cookie"},"name":"Error","req":{},"res":{}}

[jstop]

I also ran into this using the docker example with the default v1.0 on the master readme. Use release v1.3 and it should work as a result of d8aff77