Extend test_user_default_language to include timezone test.
Extend test_user_default_language to include timezone test.

This renames the function to test_user_default_language_and_timezone.

brainwane/zulip,jphilipsen05/zulip,rht/zulip,synicalsyntax/zulip,kou/zulip,andersk/zulip,Galexrt/zulip,vabs22/zulip,jphilipsen05/zulip,vaidap/zulip,jackrzhang/zulip,j831/zulip,jackrzhang/zulip,timabbott/zulip,shubhamdhama/zulip,tommyip/zulip,showell/zulip,tommyip/zulip,mahim97/zulip,mahim97/zulip,shubhamdhama/zulip,hackerkid/zulip,jackrzhang/zulip,jphilipsen05/zulip,jackrzhang/zulip,kou/zulip,dhcrzf/zulip,punchagan/zulip,verma-varsha/zulip,kou/zulip,zulip/zulip,hackerkid/zulip,brainwane/zulip,timabbott/zulip,brainwane/zulip,andersk/zulip,ryanbackman/zulip,dhcrzf/zulip,punchagan/zulip,christi3k/zulip,vaidap/zulip,jrowan/zulip,zulip/zulip,brockwhittaker/zulip,verma-varsha/zulip,amanharitsh123/zulip,timabbott/zulip,vabs22/zulip,eeshangarg/zulip,synicalsyntax/zulip,brockwhittaker/zulip,brainwane/zulip,vaidap/zulip,Galexrt/zulip,tommyip/zulip,brainwane/zulip,synicalsyntax/zulip,kou/zulip,jrowan/zulip,rishig/zulip,Galexrt/zulip,brockwhittaker/zulip,mahim97/zulip,christi3k/zulip,rishig/zulip,timabbott/zulip,j831/zulip,timabbott/zulip,verma-varsha/zulip,mahim97/zulip,kou/zulip,hackerkid/zulip,andersk/zulip,zulip/zulip,tommyip/zulip,andersk/zulip,zulip/zulip,j831/zulip,verma-varsha/zulip,dhcrzf/zulip,punchagan/zulip,eeshangarg/zulip,rishig/zulip,ryanbackman/zulip,amanharitsh123/zulip,vaidap/zulip,rht/zulip,verma-varsha/zulip,jphilipsen05/zulip,jrowan/zulip,punchagan/zulip,tommyip/zulip,rht/zulip,jackrzhang/zulip,synicalsyntax/zulip,rishig/zulip,brainwane/zulip,tommyip/zulip,rht/zulip,showell/zulip,verma-varsha/zulip,dhcrzf/zulip,jackrzhang/zulip,showell/zulip,rht/zulip,dhcrzf/zulip,showell/zulip,eeshangarg/zulip,punchagan/zulip,brainwane/zulip,vabs22/zulip,brockwhittaker/zulip,kou/zulip,timabbott/zulip,shubhamdhama/zulip,tommyip/zulip,showell/zulip,synicalsyntax/zulip,punchagan/zulip,brockwhittaker/zulip,mahim97/zulip,zulip/zulip,ryanbackman/zulip,kou/zulip,hackerkid/zulip,showell/zulip,shubhamdhama/zulip,jphilipsen05/zulip,rishig/zulip,Galexrt/zulip,punchagan/zulip,andersk/zulip,rht/zulip,hackerkid/zulip,ryanbackman/zulip,christi3k/zulip,andersk/zulip,Galexrt/zulip,synicalsyntax/zulip,synicalsyntax/zulip,jrowan/zulip,shubhamdhama/zulip,hackerkid/zulip,eeshangarg/zulip,brockwhittaker/zulip,zulip/zulip,amanharitsh123/zulip,shubhamdhama/zulip,eeshangarg/zulip,vaidap/zulip,ryanbackman/zulip,vaidap/zulip,showell/zulip,ryanbackman/zulip,vabs22/zulip,jphilipsen05/zulip,Galexrt/zulip,rht/zulip,dhcrzf/zulip,shubhamdhama/zulip,amanharitsh123/zulip,christi3k/zulip,rishig/zulip,vabs22/zulip,dhcrzf/zulip,j831/zulip,mahim97/zulip,vabs22/zulip,Galexrt/zulip,hackerkid/zulip,rishig/zulip,amanharitsh123/zulip,timabbott/zulip,christi3k/zulip,eeshangarg/zulip,andersk/zulip,zulip/zulip,jrowan/zulip,j831/zulip,christi3k/zulip,jrowan/zulip,amanharitsh123/zulip,eeshangarg/zulip,jackrzhang/zulip,j831/zulip