etcd: Replace ghodss/yaml with sigs.k8s.io/yaml

[rohitsardesai83]

To remove the dependency on ghodss/yaml. Replaced this dependency with sigs.k8s.io/yaml.
This wil help to remove the ghodss/yaml dependency from main kubernetes repository.

See :

• xref: Remove dependency on ghodss/yaml kubernetes/kubernetes#77024.
• etcd: Replace yaml dependency github.com/ghodss/yaml with sigs.k8s.io/yaml #10687.
  This pull request was raised against the master branch.
  Kubernetes uses etcd 3.3, so need to backport this fix to 3.3.

[xiang90]

@rohitsardesai83

I see

go: sigs.k8s.io/[email protected]: unrecognized import path "sigs.k8s.io/yaml" (https fetch: Get https://sigs.k8s.io/yaml?go-get=1: net/http: TLS handshake timeout)

happened in test cases. Can you check why? details: https://travis-ci.com/etcd-io/etcd/jobs/198142245

[rohitsardesai83]

@rohitsardesai83

I see

go: sigs.k8s.io/[email protected]: unrecognized import path "sigs.k8s.io/yaml" (https fetch: Get https://sigs.k8s.io/yaml?go-get=1: net/http: TLS handshake timeout)

happened in test cases. Can you check why? details: https://travis-ci.com/etcd-io/etcd/jobs/198142245

@xiang90 , I observed this failure in my PR as well : #10687 , but when I ran the test locally , it is able to pull the dependency correctly. I am not sure why the timeout occurs intermittently for this dependency in the CI.

[rohitsardesai83]

sigs.k8s.io/yaml uses this version of gopkg.in/yaml.v2.

[rohitsardesai83]

@xiang90 , @gyuho , could you please help reviewing this PR ?

[gyuho]

@rohitsardesai83 Can you create a separate PR to highlight this in changelog?

[gyuho]

@rohitsardesai83 You can just copy the line from CHANGELOG-3.4.