tests: Fix send_message calls in test_unread.py.
tests: Fix send_message calls in test_unread.py.

punchagan/zulip,brockwhittaker/zulip,hackerkid/zulip,rht/zulip,punchagan/zulip,synicalsyntax/zulip,rishig/zulip,shubhamdhama/zulip,hackerkid/zulip,showell/zulip,shubhamdhama/zulip,rishig/zulip,jackrzhang/zulip,synicalsyntax/zulip,rht/zulip,dhcrzf/zulip,synicalsyntax/zulip,jackrzhang/zulip,punchagan/zulip,eeshangarg/zulip,Galexrt/zulip,rishig/zulip,rht/zulip,zulip/zulip,brockwhittaker/zulip,tommyip/zulip,rishig/zulip,kou/zulip,synicalsyntax/zulip,zulip/zulip,brainwane/zulip,mahim97/zulip,showell/zulip,mahim97/zulip,mahim97/zulip,Galexrt/zulip,eeshangarg/zulip,rishig/zulip,rht/zulip,tommyip/zulip,tommyip/zulip,showell/zulip,kou/zulip,eeshangarg/zulip,timabbott/zulip,brockwhittaker/zulip,kou/zulip,Galexrt/zulip,Galexrt/zulip,tommyip/zulip,dhcrzf/zulip,showell/zulip,timabbott/zulip,kou/zulip,jackrzhang/zulip,Galexrt/zulip,timabbott/zulip,andersk/zulip,Galexrt/zulip,brainwane/zulip,kou/zulip,tommyip/zulip,shubhamdhama/zulip,timabbott/zulip,jackrzhang/zulip,shubhamdhama/zulip,brockwhittaker/zulip,andersk/zulip,punchagan/zulip,brockwhittaker/zulip,hackerkid/zulip,timabbott/zulip,tommyip/zulip,brockwhittaker/zulip,eeshangarg/zulip,showell/zulip,dhcrzf/zulip,jackrzhang/zulip,rishig/zulip,zulip/zulip,rht/zulip,shubhamdhama/zulip,dhcrzf/zulip,hackerkid/zulip,jackrzhang/zulip,eeshangarg/zulip,brainwane/zulip,eeshangarg/zulip,synicalsyntax/zulip,mahim97/zulip,dhcrzf/zulip,shubhamdhama/zulip,zulip/zulip,rht/zulip,zulip/zulip,brainwane/zulip,hackerkid/zulip,timabbott/zulip,hackerkid/zulip,brainwane/zulip,brainwane/zulip,brainwane/zulip,rishig/zulip,eeshangarg/zulip,synicalsyntax/zulip,andersk/zulip,showell/zulip,punchagan/zulip,hackerkid/zulip,jackrzhang/zulip,punchagan/zulip,timabbott/zulip,shubhamdhama/zulip,showell/zulip,andersk/zulip,andersk/zulip,kou/zulip,mahim97/zulip,rht/zulip,mahim97/zulip,tommyip/zulip,zulip/zulip,kou/zulip,dhcrzf/zulip,andersk/zulip,synicalsyntax/zulip,zulip/zulip,punchagan/zulip,Galexrt/zulip,andersk/zulip,dhcrzf/zulip