Refactoring xpub-xsub test
Refactoring xpub-xsub test

removed beforeEach function in efforts to resolve current travis build
issues (which are not reproducible anyways)
refactored away from XSubXPubProxy function

lablup/zeromq.node,interpretor/zeromq.js,reqshark/zeromq.node,ronkorving/node-zmq,panuhorsmalahti/zeromq.node,lgeiger/zmq-prebuilt,JustinTulloss/zeromq.node,ronkorving/zeromq.node,marchon/zeromq.node,reqshark/zeromq.node,GrabCAD/zeromq.node,marchon/zeromq.node,lgeiger/zmq-prebuilt,lablup/zeromq.node,JustinTulloss/zeromq.node,rgbkrk/zmq-prebuilt,ronkorving/node-zmq,GrabCAD/zeromq.node,tempbottle/zeromq.node,ronkorving/zeromq.node,panuhorsmalahti/zeromq.node,reunanen/zeromq.node,muut/zeromq.node,ronkorving/node-zmq,rgbkrk/zmq-prebuilt,JustinTulloss/zeromq.node,ronkorving/zeromq.node,ValYouW/zeromq.node,GrabCAD/zeromq.node,rydn/zeromq.node,lablup/zeromq.node,reunanen/zeromq.node,reqshark/zeromq.node,lgeiger/zmq-prebuilt,hhamilto/zeromq.node,JustinTulloss/zeromq.node,ronkorving/node-zmq,muut/zeromq.node,hhamilto/zeromq.node,reunanen/zeromq.node,interpretor/zeromq.js,hhamilto/zeromq.node,ronkorving/zeromq.node,lablup/zeromq.node,rgbkrk/zmq-prebuilt,ValYouW/zeromq.node,interpretor/zeromq.js,marchon/zeromq.node,hhamilto/zeromq.node,marchon/zeromq.node,panuhorsmalahti/zeromq.node,interpretor/zeromq.js,lgeiger/zmq-prebuilt,rydn/zeromq.node,GrabCAD/zeromq.node,rgbkrk/zmq-prebuilt,rgbkrk/zmq-prebuilt,lgeiger/zmq-prebuilt,panuhorsmalahti/zeromq.node,tempbottle/zeromq.node,interpretor/zeromq.js,reunanen/zeromq.node,tempbottle/zeromq.node,ValYouW/zeromq.node,rydn/zeromq.node,ValYouW/zeromq.node,tempbottle/zeromq.node,reqshark/zeromq.node,muut/zeromq.node,muut/zeromq.node,rydn/zeromq.node