test_middleware: Use test helper in nonexistent page open graph test.
test_middleware: Use test helper in nonexistent page open graph test.

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