Added a functional test for running an upstream proxy infront of the Hoverfly we test
Added a functional test for running an upstream proxy infront of the Hoverfly we test

tjcunliffe/hoverfly,tjcunliffe/hoverfly,tjcunliffe/hoverfly,SpectoLabs/hoverfly,tjcunliffe/hoverfly,tjcunliffe/hoverfly,tjcunliffe/hoverfly,SpectoLabs/hoverfly