* fix(e2e): Create next namespace if one exists
Do not error out if the namespace to run e2e into exists, try creating
next one in row. Retry at 20 next namespaces, before erroring out.
* Tag plugin tests as !serving and !eventing
* Debug: Create a test namespace to see if its skipped
* Revert "Debug: Create a test namespace to see if its skipped"
This reverts commit 8b45fcef4d.
* Refactor file utils from e2e tests to test lib
* fix(e2e): Refactor e2e utils and resource actions
brings commonly re-used utilities into lib/test so they can be resused
and e2e can be run selectively for eventing/serving.
* Refactor service and revision e2e test utils into test lib
* Docstrings for exported e2e test utils