Fix e2e-kubeadm release-1.6 job.

[pipejakob]

Recent changes to kubernetes/master moved where bazel .deb files get pushed. The kubernetes_e2e.py scenario was updated to accommodate this change, but the kubernetes/release-1.6 branch still pushes these .debs to the old location. Since we only support ci/periodic jobs for release-1.6, and we expect to use the new location from now on, consider this a special case for now and we can remove this code when we no longer support the 1.6.x series.

[krzyzacy]

add it to the unit-test?

[pipejakob]

Good call. New test added.

[krzyzacy]

Or is there something we can cherry-pick into 1.6 to make it upload to the right place?

[pipejakob]

I thought about it, but with the already-murky situation with the 1.6.3 regression, I didn't want to push for cherry-picking even more into the 1.6 branch. I'll let @ixdy chime in, since he was the proponent of moving the .deb location in the first place.

[krzyzacy]

sgtm, he'll be back Friday :-)

[pipejakob]

Oh, Friday might be on the late side, since these release-1.6 blocking tests are broken now, and the team is trying to get 1.6.4 out the door. How do you feel about getting this fix in now in order to fix the tests, and we can revisit whether we want to cherry-pick the .deb move commits (and revert this one) when @ixdy is back?

[pipejakob]

Also the bazel failure this PR just started hitting (bazel test //triage:script_test) seems to be broken on upstream/master, too.

[krzyzacy]

#2775, it's pretty flaky now..

@k8s-bot bazel test this

[krzyzacy]

/lgtm

[rmmh]

@k8s-bot bazel test this