Tweak for compatibility with IndexDepot

Modified the GetNodeInfo() method to check configuration of the default
index rather than the elasticsearch base because IndexDepot blocks
queries to the base instance.

Modified the HitsMetaData<T> class to take a list of Hits rather than
the interface IHits because this was returning Json deserialization
errors in Deserialize<T>
Remove "version" check from GetNodeInfo

Removed the "verson" check from GetNodeInfo because it isn't compatible
with IndexDepot