test_mattermost_importer: Fix missing coverage.
test_mattermost_importer: Fix missing coverage.

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