tests: fix test for node.js v0.10.x
tests: fix test for node.js v0.10.x

chimurai/http-proxy-middleware,mTazelaar/http-proxy-middleware,rbarilani/http-proxy-middleware,chimurai/http-proxy-middleware,adeneui/http-proxy-middleware,mpareja/http-proxy-middleware,xiwc/http-proxy-middleware,chimurai/http-proxy-middleware