Add `oc image extract` to support release tooling#20466

Merged

openshift-merge-robot merged 3 commits intoopenshift:masterfrom smarterclayton:extract

Aug 14, 2018

+1,837-673

Commits on Jul 30, 2018

Commits on Aug 13, 2018

Add an oc image extract command that can copy contents out of images to disk
smarterclayton
committed