Update nginx-opentracing to 0.3.0

[SEJeff]

What this PR does / why we need it: Updates nginx-opentracing to 0.3.0

Special notes for your reviewer:
This version includes opentracing-contrib/nginx-opentracing#32 to add a http.host tag. This makes it easier to search in tracing backends which lack wildcard support such as zipkin or jaeger.

[SEJeff]

/assign @bprashanth

[SEJeff]

/assign @aledbf

[SEJeff]

/retest

[antoineco]

The error is related to golang/lint#397 (there are ongoing hosting issues)

[aledbf]

@SEJeff please rebase from master. The golint issue is fixed

[codecov-io]

Codecov Report

Merging #2411 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #2411   +/-   ##
=======================================
  Coverage   40.91%   40.91%           
=======================================
  Files          74       74           
  Lines        5252     5252           
=======================================
  Hits         2149     2149           
  Misses       2809     2809           
  Partials      294      294

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[aledbf]

/approve

[aledbf]

/lgtm

[aledbf]

@SEJeff thanks!

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

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

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