Clean code syntax in test-pipes.js
Clean code syntax in test-pipes.js

- fix not-defined 'emit'
- do not declare 'counter' as global
- remove trailing whitespaces

Jonekee/request,watson/request,niklabh/request,Prasanna-sr/request,request/request,NewGyu/request,whembed197923/request,h1bomb/request,LoicMahieu/request,zodsoft/request,IveWong/request,Codelegant92/request,faradayio/request,czardoz/request,IbpTeam/node-request,MofeLee/request,wangchi/request,rbramwell/request,neo-z/request,chaoliu/request,ryanwholey/request,seegno-forks/request,motopia/request,kevinburke/request,NewGyu/request,lalitkapoor/request,kevinburke/request,phillipj/request,blabno/request,zodsoft/request,xtidt/request,wangchi/request,request/request,longwenjunjie/request,mvnnn/request,paulomcnally/request,Jonekee/request,beni55/request,beni55/request,simov/request,udp/request,HAKASHUN/request,kmulvey/request,lxe/request,simov/request,cvibhagool/request,chaoliu/request,lxe/request,jsifuentes/request,cvibhagool/request,xtidt/request,manishnakar/request,seegno-forks/request,whembed197923/request,pablobrady/request,jzaefferer/request,pablobrady/request,sean3z/request,czardoz/request,jsifuentes/request,pho3nixf1re/request,zhouweiming/request,lalitkapoor/request,not001praween001/request,calibr/request,motopia/request,not001praween001/request,LoicMahieu/request,manishnakar/request,wakermahmud/request,blabno/request,faradayio/request,robu3/request,mvnnn/request,djchie/request,MofeLee/request,jzaefferer/request,Prasanna-sr/request,longwenjunjie/request,wakermahmud/request,HAKASHUN/request,xiwc/request,sean3z/request,rbramwell/request,ryanwholey/request,phillipj/request,robu3/request,Aloomaio/request,nishant8BITS/request,IbpTeam/node-request,kmulvey/request,linalu1/request,Aloomaio/request,neo-z/request,IveWong/request,udp/request,Codelegant92/request,pho3nixf1re/request,djchie/request,calibr/request,nishant8BITS/request,zhouweiming/request,linalu1/request,xiwc/request,kublaj/request,h1bomb/request,paulomcnally/request,kublaj/request,watson/request,niklabh/request