Fix send_message calls in test_embedded_bot_system.py.
Fix send_message calls in test_embedded_bot_system.py.

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