Add methods to AuthedTestCase to test response content.
Add methods to AuthedTestCase to test response content.

Add methods assert_equals_response and assert_in_response to
AuthedTestCase.  These methods make it convenient to check if
a string equals the contents of an HttpResponse's body or if a
string is a substring of the contents of an HttpResponse's body.

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