Exportv4 cs mongodb into es

I know this is already done, but I missed this before - this is not a great name. "IsolatedElasticSearchSuite" is strongly reminiscent of "IsolatedMgoSuite" which isn't actually a test suite, but a test suite helper.

This suite is *actually* the elastic search package test suite. If we don't want to name
it "ElasticSearchSuite" as that's very similar to storetesting.ElasticSearchSuite, I'd
suggest naming it just "Suite" as there's only one test suite in this package.