embedded bots: Test that BotHandler.initialize is called.
embedded bots: Test that BotHandler.initialize is called.

This brings coverage for EmbeddedBotWorker to 100%.

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