Add auth attributes and change test size for go_default_test

[apicl]

1503

Release note:

NONE

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This change is 

[geeknoid]

@douglas-reid @sebastienvas

What happens when we set a test size to medium? Will the lab still run these tests as part of precommit checks?

[apicl]

It still runs as part of the pre-push. The only different is that the pre-push will wait a little longer.

[apicl]

PTAL

[geeknoid]

/lgtm

[geeknoid]

/lgtm

[codecov[bot]]

Codecov Report

Merging #1505 into master will not change coverage. The diff coverage is n/a.

@@          Coverage Diff           @@
##           master   #1505   +/-   ##
======================================
  Coverage    84.6%   84.6%           
======================================
  Files         122     122           
  Lines       11997   11997           
======================================
  Hits        10150   10150           
  Misses       1646    1646           
  Partials      201     201

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[istio-merge-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: geeknoid

The full list of commands accepted by this bot can be found here.

Needs approval from an approver in each of these OWNERS Files: - ~~[OWNERS](https://github.com/istio/mixer/blob/master/OWNERS)~~ [geeknoid] You can indicate your approval by writing `/approve` in a comment You can cancel your approval by writing `/approve cancel` in a comment

[istio-merge-robot]

/test all [submit-queue is verifying that this PR is safe to merge]

[douglas-reid]

@geeknoid small -> medium shouldn't have any observable impact. moving to large or bigger will, based on our configuration, which includes:

test --test_size_filters=-large,-enormous

[istio-merge-robot]

Automatic merge from submit-queue.