analytics: Fix midnight-related bug in test.
analytics: Fix midnight-related bug in test.

Previously, this would flake if the day changed between
user2 = do_create_user('email2', 'password', ...) and
do_deactivate_user(user2).

hackerkid/zulip,punchagan/zulip,brainwane/zulip,andersk/zulip,rishig/zulip,kou/zulip,rishig/zulip,rishig/zulip,rht/zulip,andersk/zulip,timabbott/zulip,eeshangarg/zulip,showell/zulip,brainwane/zulip,tommyip/zulip,hackerkid/zulip,andersk/zulip,hackerkid/zulip,kou/zulip,eeshangarg/zulip,brainwane/zulip,rht/zulip,punchagan/zulip,tommyip/zulip,zulip/zulip,shubhamdhama/zulip,timabbott/zulip,rishig/zulip,brainwane/zulip,rishig/zulip,synicalsyntax/zulip,kou/zulip,zulip/zulip,shubhamdhama/zulip,brainwane/zulip,punchagan/zulip,synicalsyntax/zulip,shubhamdhama/zulip,kou/zulip,synicalsyntax/zulip,hackerkid/zulip,timabbott/zulip,eeshangarg/zulip,shubhamdhama/zulip,tommyip/zulip,rishig/zulip,kou/zulip,punchagan/zulip,showell/zulip,rht/zulip,punchagan/zulip,kou/zulip,timabbott/zulip,zulip/zulip,hackerkid/zulip,synicalsyntax/zulip,brainwane/zulip,eeshangarg/zulip,andersk/zulip,hackerkid/zulip,tommyip/zulip,zulip/zulip,punchagan/zulip,tommyip/zulip,synicalsyntax/zulip,kou/zulip,tommyip/zulip,shubhamdhama/zulip,andersk/zulip,tommyip/zulip,punchagan/zulip,andersk/zulip,eeshangarg/zulip,zulip/zulip,rht/zulip,timabbott/zulip,eeshangarg/zulip,synicalsyntax/zulip,timabbott/zulip,shubhamdhama/zulip,eeshangarg/zulip,zulip/zulip,showell/zulip,timabbott/zulip,showell/zulip,hackerkid/zulip,andersk/zulip,rht/zulip,rishig/zulip,brainwane/zulip,synicalsyntax/zulip,rht/zulip,shubhamdhama/zulip,rht/zulip,showell/zulip,showell/zulip,zulip/zulip,showell/zulip