Export everything using the PreferredVersion

[jmontleon]

First PR for https://github.com/konveyor/crane/issues/128

Fixes https://github.com/konveyor/crane/issues/102 with an upcoming PR to crane-lib

[openshift-ci[bot]]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: djzager, jmontleon

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[djzager]

/hold cancel