Minor Description
Currently, some SolrClient implementations (especially our "load-balancing" and "cloud" clients) do pattern-matching on the path to guess the "type" (admin, update, etc. ) of each request. This seems unnecessary though, as SolrRequest already has a "getRequestType" method exposing this. We should use this method where possible instead of the ad-hoc pattern matching we currently do, which is brittle and doesn't map well to the varied paths used by our v2 APIs.