Fix mock printing PVCs due to reading PVC file twice

[mphammer]

Closes Issue #1119

[msenmurugan]

/cherrypick release-2020.2.x

[operator-r2d2]

@msenmurugan: once the present PR merges, I will cherry-pick it on top of release-2020.2.x in a new PR and assign it to you.

In response to this:

/cherrypick release-2020.2.x

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[msenmurugan]

/lgtm

[operator-r2d2]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: mphammer, msenmurugan

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[operator-r2d2]

@msenmurugan: new pull request created: #1281

In response to this:

/cherrypick release-2020.2.x

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository.