fix(web-server): close webserver after running
fix(web-server): close webserver after running

When we're done running the tests and all clients are disconnected,
we should stop the http server. This way another karma instance (or
anything else for that matter) may reuse the port later.

panrafal/karma,timebackzhou/karma,gayancliyanage/karma,marthinus-engelbrecht/karma,shirish87/karma,IveWong/karma,kahwee/karma,Dignifiedquire/karma,pmq20/karma,hitesh97/karma,brianmhunt/karma,unional/karma,pmq20/karma,jacopotarantino/karma,johnjbarton/karma,simudream/karma,IsaacChapman/karma,skycocker/karma,astorije/karma,chrisirhc/karma,rgaskill/karma,harme199497/karma,sylvain-hamel/karma,karma-runner/karma,growlybear/karma,kahwee/karma,behzad88/karma,rhlass/karma,ijobling/karma,swayf/karma,IsaacChapman/karma,rageshkrishna/karma,jamestalmage/karma,marcodejongh/karma,brianmhunt/karma,Klaudit/karma,dmitriiabramov/karma,Basemm/karma,kahwee/karma,jeffjewiss/karma,oyiptong/karma,harme199497/karma,behzad88/karma,Sanjo/karma,aiboy/karma,jeffjewiss/karma,pedrosnk/karma,viruschidai/karma,oyiptong/karma,skycocker/karma,skycocker/karma,gayancliyanage/karma,aiboy/karma,IsaacChapman/karma,xiaoking/karma,ernsheong/karma,dmitriiabramov/karma,chrisirhc/karma,Dignifiedquire/karma,r3mi/karma,youprofit/karma,oyiptong/karma,Klaudit/karma,thomasboyt/karma,marthinus-engelbrecht/karma,wesleycho/karma,codedogfish/karma,brianmhunt/karma,rageshkrishna/karma,wesleycho/karma,codedogfish/karma,simudream/karma,ernsheong/karma,aiboy/karma,nmalaguti/karma,KrekkieD/karma,pedrotcaraujo/karma,swayf/karma,hitesh97/karma,mprobst/karma,lencioni/karma,rageshkrishna/karma,pedrotcaraujo/karma,adamnation/karma,adamnation/karma,shirish87/karma,jjoos/karma,vtsvang/karma,Klaudit/karma,growlybear/karma,jamestalmage/karma,simudream/karma,jjoos/karma,mprobst/karma,clbond/karma,wesleycho/karma,jjoos/karma,rhlass/karma,hitesh97/karma,unional/karma,Sanjo/karma,behzad88/karma,Sanjo/karma,harme199497/karma,skycocker/karma,vojtajina/karma,rhlass/karma,cironunes/karma,jsdir/karma,nmalaguti/karma,johnjbarton/karma,KrekkieD/karma,codedogfish/karma,oyiptong/karma,unional/karma,johnjbarton/karma,growlybear/karma,vtsvang/karma,timebackzhou/karma,jsdir/karma,david-garcia-nete/karma,patrickporto/karma,yandex-lego/karma,buley/karma,jsdir/karma,KrekkieD/karma,tomkuk/karma,cironunes/karma,Klaudit/karma,maksimr/karma,unional/karma,Sanjo/karma,ernsheong/karma,jjoos/karma,xiaoking/karma,viruschidai/karma,sylvain-hamel/karma,david-garcia-nete/karma,adamnation/karma,buley/karma,thomasboyt/karma,buley/karma,youprofit/karma,maksimr/karma,clbond/karma,pedrosnk/karma,tomkuk/karma,yandex-lego/karma,jamestalmage/karma,KrekkieD/karma,IveWong/karma,patrickporto/karma,xiaoking/karma,SamuelMarks/karma,bitwiseman/karma,rgaskill/karma,vtsvang/karma,maksimr/karma,panrafal/karma,jamestalmage/karma,gayancliyanage/karma,karma-runner/karma,ijobling/karma,chrisirhc/karma,david-garcia-nete/karma,shirish87/karma,pmq20/karma,pedrotcaraujo/karma,jeffjewiss/karma,IveWong/karma,r3mi/karma,patrickporto/karma,xiaoking/karma,wesleycho/karma,stevemao/karma,fivetanley/karma,powerkid/karma,karma-runner/karma,SamuelMarks/karma,vtsvang/karma,jacopotarantino/karma,hitesh97/karma,marthinus-engelbrecht/karma,clbond/karma,bitwiseman/karma,powerkid/karma,astorije/karma,stevemao/karma,marthinus-engelbrecht/karma,SamuelMarks/karma,Dignifiedquire/karma,astorije/karma,codedogfish/karma,lencioni/karma,yandex-lego/karma,youprofit/karma,powerkid/karma,timebackzhou/karma,ijobling/karma,sylvain-hamel/karma,IveWong/karma,dmitriiabramov/karma,bitwiseman/karma,IsaacChapman/karma,Dignifiedquire/karma,pmq20/karma,tomkuk/karma,nmalaguti/karma,powerkid/karma,kahwee/karma,stevemao/karma,fivetanley/karma,stevemao/karma,marcodejongh/karma,timebackzhou/karma,karma-runner/karma,vojtajina/karma,chrisirhc/karma,youprofit/karma,brianmhunt/karma,gayancliyanage/karma,pedrosnk/karma,patrickporto/karma,nmalaguti/karma,aiboy/karma,tomkuk/karma,pedrotcaraujo/karma,mprobst/karma,vojtajina/karma,panrafal/karma,astorije/karma,buley/karma,rhlass/karma,simudream/karma,rgaskill/karma,clbond/karma,lencioni/karma,harme199497/karma,johnjbarton/karma,Basemm/karma