Improve the documentation for oc rollout#17081

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openshift-merge-robot merged 1 commit intoopenshift:masterfrom

linzhaoming:fix-usage

Nov 14, 2017

Commits on Oct 28, 2017

Since the 'oc deploy' is deprecated. It is better for providing usage 'oc set trigger'. Forgetting the 'oc deploy'.
linzhaoming
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