nfs-client: adding support for s390x

[namrata-ibm]

This PR includes:

• Enabling s390x builds in Travis
• Deploying image for s390x to Registry through Travis builds

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[namrata-ibm]

I signed CLA

[namrata-ibm]

@wongma7 @jsafrane @cofyc could you please have a look?

[namrata-ibm]

Any updates on this?

[namrata-ibm]

@wongma7 @jsafrane @cofyc could you please check?

[namrata-ibm]

/assign @jsafrane @wongma7

[kmova]

Hi @namrata-ibm.

We are in the middle of migrating the NFS client code into a new home under https://github.com/kubernetes-sigs/nfs-subdir-external-provisioner. The migration PR is up for review at the moment. https://github.com/kubernetes-sigs/nfs-subdir-external-provisioner/pull/2

Thank you for this PR and your patience. Can I circle back with you to push these changes into the new repo once the above migration PR is closed?

[namrata-ibm]

Thank you @kmova for getting back, Please let me know when the new repo is ready to pull these changes.

[nikhita]

As @kmova mentioned, we are in the process of archiving this repo and continuing work in https://github.com/kubernetes-sigs/nfs-subdir-external-provisioner. Please reopen a PR in the new repo once https://github.com/kubernetes-sigs/nfs-subdir-external-provisioner/pull/2 has merged. Thanks for your patience! :)

Going to close this PR in order to be able to archive this repo.