Include tests in golint checks, fix warnings

[antoineco]

What this PR does / why we need it:

golint enforces good practices for writing Go code, therefore it makes sense to run checks on test packages as well. Since "should not use dot imports" is the only warning we really want to ignore (ginkgo imports), it is simple enough to exclude these warnings from the golint output.

List of lint warnings tackled by this PR:

test/e2e/framework/cleanup.go:21:6: exported type CleanupActionHandle should have comment or be unexported
test/e2e/framework/framework.go:40:2: exported const MaxRetry should have comment (or a comment on this block) or be unexported
test/e2e/framework/framework.go:44:6: exported type RequestScheme should have comment or be unexported
test/e2e/framework/k8s.go:30:1: exported method Framework.EnsureSecret should have comment or be unexported
test/e2e/framework/k8s.go:41:1: exported method Framework.EnsureIngress should have comment or be unexported
test/e2e/framework/k8s.go:52:1: exported method Framework.EnsureService should have comment or be unexported
test/e2e/framework/k8s.go:63:1: exported method Framework.EnsureDeployment should have comment or be unexported
test/e2e/framework/k8s.go:74:1: exported method Framework.WaitForPodsReady should have comment or be unexported
test/e2e/framework/logs.go:27:1: exported method Framework.Logs should have comment or be unexported
test/e2e/framework/ssl.go:77:21: error strings should not be capitalized or end with punctuation or a newline
test/e2e/framework/ssl.go:81:21: error strings should not be capitalized or end with punctuation or a newline
test/e2e/framework/ssl.go:122:21: error strings should not be capitalized or end with punctuation or a newline
test/e2e/framework/ssl.go:125:21: error strings should not be capitalized or end with punctuation or a newline
test/e2e/framework/ssl.go:128:21: error strings should not be capitalized or end with punctuation or a newline
test/e2e/framework/test_context.go:28:6: exported type TestContextType should have comment or be unexported
test/e2e/framework/test_context.go:34:5: exported var TestContext should have comment or be unexported
test/e2e/framework/test_context.go:36:1: comment on exported function RegisterCommonFlags should be of the form "RegisterCommonFlags ..."
test/e2e/framework/test_context.go:52:1: exported function RegisterParseFlags should have comment or be unexported
test/e2e/framework/util.go:55:1: exported function Logf should have comment or be unexported
test/e2e/framework/util.go:59:1: exported function Failf should have comment or be unexported
test/e2e/framework/util.go:65:1: exported function Skipf should have comment or be unexported
test/e2e/framework/util.go:71:1: exported function RestclientConfig should have comment or be unexported
test/e2e/framework/util.go:74:26: error strings should not be capitalized or end with punctuation or a newline
test/e2e/framework/util.go:87:6: exported type ClientConfigGetter should have comment or be unexported
test/e2e/framework/util.go:89:1: exported function LoadConfig should have comment or be unexported
test/e2e/framework/util.go:131:1: exported function ExpectNoError should have comment or be unexported

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[codecov-io]

Codecov Report

Merging #2180 into master will increase coverage by 0.06%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master    #2180      +/-   ##
==========================================
+ Coverage   36.45%   36.51%   +0.06%     
==========================================
  Files          69       69              
  Lines        4861     4861              
==========================================
+ Hits         1772     1775       +3     
+ Misses       2819     2817       -2     
+ Partials      270      269       -1

Impacted Files	Coverage Δ
cmd/nginx/main.go	23.44% <0%> (+2.06%)	⬆️

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[k8s-ci-robot]

Thanks for your pull request. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

📝 Please follow instructions at https://git.k8s.io/community/CLA.md#the-contributor-license-agreement to sign the CLA.

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[antoineco]

/assign @aledbf

[aledbf]

/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: aledbf, antoineco

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[aledbf]

@antoineco thanks!