First integration test

initial integration test that hits an HTTP endpoint that just returns 200 or something

could be without tor, but with database setup

changed milestone to %Mailbox

added Sponsor 6 label

added T: task label

mentioned in issue #26 (closed)

mentioned in merge request !11 (closed)

assigned to @grote

added S: in code review label

mentioned in merge request !13 (merged)

mentioned in commit 7682f0dc

closed with merge request !13 (merged)

added R: fixed label and removed S: in code review label

added Mailbox label

added Weight: 1 label

added Mailbox app label