text_fixtures: Fix case where source_hash_file doesn't exist.
text_fixtures: Fix case where source_hash_file doesn't exist.

We unfortunately just broke provisioning because we didn't correctly
handle the case where the source_hash_file didn't exist.

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