Update kubernetes-webdemo configuration. (#251)
Update kubernetes-webdemo configuration. (#251)

* 4 replicas.
* Explicit image version.
allenai/allennlp,nafitzgerald/allennlp,nafitzgerald/allennlp,nafitzgerald/allennlp,allenai/allennlp,allenai/allennlp,allenai/allennlp,nafitzgerald/allennlp