Change stream used in test_get_old_messages_with_only_searching_anchor.
Change stream used in test_get_old_messages_with_only_searching_anchor.

This prevents this test from breaking when in a few commits we fix a
nondeterminism issue in the populate_db test fixtures.

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