Statserver test cleanup and benchmark enhancement.

[markusthoemmes]

Proposed Changes

• A few touchups to test functions and helpers.
• Adds back different amounts of messages to be sent per iteration to more closely resemble what the activator is actually doing and to surface potential for optimization in future iterations.

Release Note

NONE

/assign @julz

[knative-prow-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: markusthoemmes

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Details

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• pkg/autoscaler/OWNERS [markusthoemmes]

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[knative-prow-robot]

@markusthoemmes: 0 warnings.

Details

In response to this:

Proposed Changes

• A few touchups to test functions and helpers.
• Adds back different amounts of messages to be sent per iteration to more closely resemble what the activator is actually doing and to surface potential for optimization in future iterations.

Release Note

NONE

/assign @julz

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[knative-metrics-robot]

The following is the coverage report on the affected files.
Say /test pull-knative-serving-go-coverage to re-run this coverage report

File	Old Coverage	New Coverage	Delta
pkg/autoscaler/statserver/server.go	81.2%	83.8%	2.5

[julz]

/lgtm

[knative-test-reporter-robot]

The following jobs failed:

Test name	Triggers	Retries
pull-knative-serving-integration-tests	pull-knative-serving-integration-tests	1/3

Automatically retrying due to test flakiness...
/test pull-knative-serving-integration-tests