Elasticache paths should start with '/'

[mcorner]

To be compatible with Amazon ECS paths have to start with '/'

So:
indexResponse = restClient.performRequest("GET", index + "/_search",

should be:

		indexResponse = restClient.performRequest("GET", "/" + index + "/_search",

[mcorner]

And the elasticsearch port should be configurable (AWS uses 80 and 443)