Implement clone, commit and push of release notes draft to user's fork#1102

Merged

k8s-ci-robot merged 1 commit intokubernetes:masterfrom puerco:master

Feb 21, 2020

+202-9

Commits on Feb 20, 2020

[krel] release-notes add --format and sigrelease-fork-path options and other fixes
puerco
committed