New Provider: Evergage

Added Evergage as a new provider and a set of tests for Evergage.  Evergage's initialization pulls server-side account variables for the customer that changes the execution, such as whether accounts are enabled (B2B) and whether to track users anonymously, I had to create different execution sets for each of these scenarios.  B2B w/anon enabled, B2B w/anon disabled, B2C w/anon enabled, and B2C w/anon disabled.