Fix python 3 decode error in zerver/tests.py.
Fix python 3 decode error in zerver/tests.py.

Refer to #256.

rht/zulip,peiwei/zulip,hackerkid/zulip,ryansnowboarder/zulip,ahmadassaf/zulip,vabs22/zulip,vikas-parashar/zulip,brainwane/zulip,krtkmj/zulip,brockwhittaker/zulip,peguin40/zulip,AZtheAsian/zulip,cosmicAsymmetry/zulip,christi3k/zulip,grave-w-grave/zulip,TigorC/zulip,dawran6/zulip,souravbadami/zulip,timabbott/zulip,jainayush975/zulip,zacps/zulip,sharmaeklavya2/zulip,mohsenSy/zulip,eeshangarg/zulip,reyha/zulip,jrowan/zulip,dawran6/zulip,eeshangarg/zulip,christi3k/zulip,reyha/zulip,reyha/zulip,susansls/zulip,amanharitsh123/zulip,synicalsyntax/zulip,hackerkid/zulip,jrowan/zulip,punchagan/zulip,zacps/zulip,vikas-parashar/zulip,Juanvulcano/zulip,TigorC/zulip,dhcrzf/zulip,paxapy/zulip,PhilSk/zulip,andersk/zulip,vabs22/zulip,christi3k/zulip,rishig/zulip,jrowan/zulip,showell/zulip,cosmicAsymmetry/zulip,synicalsyntax/zulip,samatdav/zulip,dhcrzf/zulip,sonali0901/zulip,rishig/zulip,rht/zulip,ahmadassaf/zulip,KingxBanana/zulip,Vallher/zulip,tommyip/zulip,synicalsyntax/zulip,brainwane/zulip,vabs22/zulip,mohsenSy/zulip,brockwhittaker/zulip,AZtheAsian/zulip,cosmicAsymmetry/zulip,Frouk/zulip,aakash-cr7/zulip,samatdav/zulip,Diptanshu8/zulip,verma-varsha/zulip,eeshangarg/zulip,souravbadami/zulip,dhcrzf/zulip,mohsenSy/zulip,tommyip/zulip,vabs22/zulip,sharmaeklavya2/zulip,krtkmj/zulip,amyliu345/zulip,ryansnowboarder/zulip,cosmicAsymmetry/zulip,sup95/zulip,Diptanshu8/zulip,dwrpayne/zulip,mahim97/zulip,brockwhittaker/zulip,krtkmj/zulip,verma-varsha/zulip,verma-varsha/zulip,zulip/zulip,susansls/zulip,isht3/zulip,brockwhittaker/zulip,zulip/zulip,isht3/zulip,umkay/zulip,cosmicAsymmetry/zulip,KingxBanana/zulip,Frouk/zulip,TigorC/zulip,Jianchun1/zulip,Vallher/zulip,peiwei/zulip,dattatreya303/zulip,paxapy/zulip,TigorC/zulip,j831/zulip,blaze225/zulip,brainwane/zulip,calvinleenyc/zulip,souravbadami/zulip,vikas-parashar/zulip,brainwane/zulip,dawran6/zulip,Frouk/zulip,susansls/zulip,sup95/zulip,timabbott/zulip,tommyip/zulip,j831/zulip,j831/zulip,vikas-parashar/zulip,peiwei/zulip,blaze225/zulip,JPJPJPOPOP/zulip,ahmadassaf/zulip,timabbott/zulip,rht/zulip,jackrzhang/zulip,aakash-cr7/zulip,isht3/zulip,rht/zulip,dattatreya303/zulip,Juanvulcano/zulip,aakash-cr7/zulip,sharmaeklavya2/zulip,Juanvulcano/zulip,jackrzhang/zulip,krtkmj/zulip,peguin40/zulip,punchagan/zulip,PhilSk/zulip,ahmadassaf/zulip,AZtheAsian/zulip,zacps/zulip,mohsenSy/zulip,umkay/zulip,ryanbackman/zulip,mahim97/zulip,Frouk/zulip,zulip/zulip,amanharitsh123/zulip,JPJPJPOPOP/zulip,arpith/zulip,punchagan/zulip,joyhchen/zulip,andersk/zulip,kou/zulip,PhilSk/zulip,dawran6/zulip,amyliu345/zulip,Diptanshu8/zulip,umkay/zulip,Juanvulcano/zulip,ryanbackman/zulip,vaidap/zulip,amyliu345/zulip,souravbadami/zulip,blaze225/zulip,blaze225/zulip,jackrzhang/zulip,zacps/zulip,paxapy/zulip,ryansnowboarder/zulip,isht3/zulip,niftynei/zulip,grave-w-grave/zulip,joyhchen/zulip,mohsenSy/zulip,mahim97/zulip,mohsenSy/zulip,synicalsyntax/zulip,susansls/zulip,hackerkid/zulip,Vallher/zulip,dattatreya303/zulip,amyliu345/zulip,samatdav/zulip,dwrpayne/zulip,SmartPeople/zulip,jainayush975/zulip,shubhamdhama/zulip,AZtheAsian/zulip,verma-varsha/zulip,ryanbackman/zulip,verma-varsha/zulip,jainayush975/zulip,JPJPJPOPOP/zulip,rishig/zulip,Galexrt/zulip,Vallher/zulip,vikas-parashar/zulip,JPJPJPOPOP/zulip,joyhchen/zulip,rishig/zulip,reyha/zulip,jackrzhang/zulip,paxapy/zulip,zulip/zulip,calvinleenyc/zulip,vabs22/zulip,shubhamdhama/zulip,samatdav/zulip,krtkmj/zulip,jphilipsen05/zulip,andersk/zulip,showell/zulip,peiwei/zulip,mahim97/zulip,andersk/zulip,jphilipsen05/zulip,vaidap/zulip,sonali0901/zulip,grave-w-grave/zulip,amanharitsh123/zulip,brainwane/zulip,Galexrt/zulip,blaze225/zulip,jphilipsen05/zulip,synicalsyntax/zulip,arpith/zulip,arpith/zulip,jainayush975/zulip,blaze225/zulip,synicalsyntax/zulip,sonali0901/zulip,punchagan/zulip,Galexrt/zulip,Diptanshu8/zulip,aakash-cr7/zulip,grave-w-grave/zulip,PhilSk/zulip,KingxBanana/zulip,andersk/zulip,umkay/zulip,jackrzhang/zulip,dwrpayne/zulip,shubhamdhama/zulip,ryansnowboarder/zulip,Juanvulcano/zulip,showell/zulip,punchagan/zulip,sonali0901/zulip,Galexrt/zulip,joyhchen/zulip,ahmadassaf/zulip,peguin40/zulip,SmartPeople/zulip,brockwhittaker/zulip,ahmadassaf/zulip,Vallher/zulip,timabbott/zulip,Frouk/zulip,niftynei/zulip,amanharitsh123/zulip,sharmaeklavya2/zulip,dhcrzf/zulip,peiwei/zulip,rishig/zulip,Galexrt/zulip,hackerkid/zulip,jphilipsen05/zulip,jphilipsen05/zulip,vabs22/zulip,reyha/zulip,rishig/zulip,punchagan/zulip,niftynei/zulip,amyliu345/zulip,rht/zulip,dwrpayne/zulip,verma-varsha/zulip,umkay/zulip,tommyip/zulip,peiwei/zulip,calvinleenyc/zulip,showell/zulip,amanharitsh123/zulip,dhcrzf/zulip,sup95/zulip,arpith/zulip,rishig/zulip,andersk/zulip,TigorC/zulip,rht/zulip,souravbadami/zulip,j831/zulip,niftynei/zulip,kou/zulip,souravbadami/zulip,tommyip/zulip,isht3/zulip,TigorC/zulip,samatdav/zulip,jrowan/zulip,krtkmj/zulip,shubhamdhama/zulip,PhilSk/zulip,sharmaeklavya2/zulip,Vallher/zulip,brainwane/zulip,showell/zulip,PhilSk/zulip,susansls/zulip,shubhamdhama/zulip,KingxBanana/zulip,ryansnowboarder/zulip,SmartPeople/zulip,dattatreya303/zulip,rht/zulip,timabbott/zulip,dhcrzf/zulip,AZtheAsian/zulip,kou/zulip,JPJPJPOPOP/zulip,vaidap/zulip,joyhchen/zulip,Jianchun1/zulip,dwrpayne/zulip,Jianchun1/zulip,jainayush975/zulip,ryanbackman/zulip,mahim97/zulip,sonali0901/zulip,dwrpayne/zulip,hackerkid/zulip,grave-w-grave/zulip,jphilipsen05/zulip,zulip/zulip,KingxBanana/zulip,vaidap/zulip,vaidap/zulip,grave-w-grave/zulip,amyliu345/zulip,Jianchun1/zulip,zulip/zulip,dattatreya303/zulip,sup95/zulip,umkay/zulip,mahim97/zulip,eeshangarg/zulip,vikas-parashar/zulip,brockwhittaker/zulip,eeshangarg/zulip,calvinleenyc/zulip,Jianchun1/zulip,susansls/zulip,ryanbackman/zulip,ahmadassaf/zulip,jainayush975/zulip,shubhamdhama/zulip,paxapy/zulip,kou/zulip,hackerkid/zulip,punchagan/zulip,Diptanshu8/zulip,kou/zulip,shubhamdhama/zulip,reyha/zulip,AZtheAsian/zulip,christi3k/zulip,dawran6/zulip,kou/zulip,Frouk/zulip,showell/zulip,tommyip/zulip,sonali0901/zulip,KingxBanana/zulip,JPJPJPOPOP/zulip,sharmaeklavya2/zulip,Galexrt/zulip,peguin40/zulip,Frouk/zulip,zacps/zulip,eeshangarg/zulip,aakash-cr7/zulip,hackerkid/zulip,sup95/zulip,timabbott/zulip,vaidap/zulip,peiwei/zulip,jrowan/zulip,ryansnowboarder/zulip,jackrzhang/zulip,jrowan/zulip,zacps/zulip,andersk/zulip,brainwane/zulip,sup95/zulip,dattatreya303/zulip,niftynei/zulip,dwrpayne/zulip,j831/zulip,j831/zulip,SmartPeople/zulip,isht3/zulip,timabbott/zulip,dhcrzf/zulip,amanharitsh123/zulip,SmartPeople/zulip,samatdav/zulip,aakash-cr7/zulip,ryansnowboarder/zulip,synicalsyntax/zulip,Vallher/zulip,peguin40/zulip,christi3k/zulip,SmartPeople/zulip,Jianchun1/zulip,paxapy/zulip,kou/zulip,jackrzhang/zulip,ryanbackman/zulip,krtkmj/zulip,peguin40/zulip,eeshangarg/zulip,joyhchen/zulip,Galexrt/zulip,niftynei/zulip,calvinleenyc/zulip,umkay/zulip,Diptanshu8/zulip,calvinleenyc/zulip,arpith/zulip,cosmicAsymmetry/zulip,christi3k/zulip,showell/zulip,dawran6/zulip,arpith/zulip,tommyip/zulip,zulip/zulip,Juanvulcano/zulip