Bug#1016828: poc-streamer: flaky autopkgtest: regularly times out on i386

[Eriberto <eriberto@eriberto.pro.br>]

> I looked at the results of the autopkgtest of you package because it was
> showing up on our "slow" page [1]. I noticed that there were several
> runs that took 8:21 (our timeout time per test times 3), while
> successful runs more in the order of a minute.
>
> Because the unstable-to-testing migration software now blocks on
> regressions in testing, flaky tests, i.e. tests that flip between
> passing and failing without changes to the list of installed packages,
> are causing people unrelated to your package to spend time on these
> tests.
[...]
>
> [1] https://ci.debian.net/status/slow/

Hi Paul,

I noticed that superficial tests around pob-2250, pob-3119 and pob-fec
are failing. I set a timeout (3 minutes) for these tests and I set
them as flaky. I hope these procedures fix all issues.

Cheers,

Eriberto