do not show IP in output of testcases

On travis-ci connect.cc detects a rotation, triggering it store the IP
which is later appended to the error message, which is all nice and
great if we deal with a real server, but in the testcases it just
triggers failures as strings do not match.

Git-Dch: Ignore
fix http-pipeline-messup testcase

The test generates failures if the created deb files have the same size,
so we try a little harder to avoid having the same size for them.

Git-Dch: Ignore