SDK Endpoint is printed to standard output

[glaxaco]

The SumoLogic constructor calls an internal _get_endpoint method, which prints an "SDK Endpoint" to standard output; e.g. SDK Endpoint https://api.us2.sumologic.com/api. This makes it difficult to write utilities that are intended to be used in a unix-style pipeline, such as outputting JSON that can be parsed manipulated downstream by tools such as jq.