Refactor and fix metrics export tests.#1957

Merged

knative-prow-robot merged 7 commits intoknative:masterfrom evankanderson:opencensus-fix

Dec 18, 2020

+655-606

Commits on Dec 14, 2020

Cleanup per vagababov
evankanderson
committed

Commits on Dec 15, 2020

Merge remote-tracking branch 'upstream/master' into opencensus-fix
Evan Anderson
committed

Commits on Dec 18, 2020

Switch to zap.Error but avoid the bug the code previously had.
Evan Anderson
committed