[VOTE] Heron Release 0.20.3-incubating Release Candidate 7

Hello Heron Community, This is a call for a vote to the 7th release candidate for Apache Heron, version 0.20.3-incubating. We request project mentors (binded) as well as all contributors (unbinded) and users to review and vote on this incubator release. * The tag to be voted upon: 0.20.3-incubat

Re: 7/28/2020 Bi-Weekly OSS Heron Sync-up

- Testing release candidates - Review/Merge various pull requests - Completed: -- Updated Bookkeeper to 4.11.0 < https://github.com/apache/incubator-heron/pull/3571> -- Updated Bazel to 3.4.1 < https://github.com/apache/incubator-heron/pull/3576> -- Fix for Helm startup logic < https://github.com/a