Add v1.5.2, v1.6.0 and v1.7.0 to CHANGELOG.md#887

Merged

k8s-ci-robot merged 1 commit intokubernetes:masterfrom spencerhance:update-changelog

Oct 8, 2019

+158-2

Commits on Oct 8, 2019

Add v1.5.2, v1.6.0, and v1.7.0 to CHANGELOG.md
spencerhance
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