travis: Improve debuggability of server wget failures.
travis: Improve debuggability of server wget failures.

The main improvement here is causing `wget` errors to be ignored so
that we see the server logs in the event of a `wget` failure.

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