chore(dataproc): release 0.6.1

[codyoss]

This pull request was generated using releasetool.

[codyoss]

@busunkim96 I think a label was supposed to added to the PR(via releasetool), but I seem to not have the proper access so the cli flaked out on me. Seems to have created the PR though. What label should I manually add to keep the process going?

[googlebot]

We found a Contributor License Agreement for you (the sender of this pull request), but were unable to find agreements for all the commit author(s) or Co-authors. If you authored these, maybe you used a different email address in the git commits than was used to sign the CLA (login here to double check)? If these were authored by someone else, then they will need to sign a CLA as well, and confirm that they're okay with these being contributed to Google.
In order to pass this check, please resolve this problem and then comment @googlebot I fixed it.. If the bot doesn't comment, it means it doesn't think anything has changed.

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[googlebot]

CLAs look good, thanks!

ℹ️ Googlers: Go here for more info.

[busunkim96]

@codyoss You can add the label autorelease: pending manually (once you have write access to the repo)

[busunkim96]

You're good to merge this now @codyoss 👍

[yoshi-automation]

Release is at https://github.com/googleapis/google-cloud-python/releases/tag/dataproc-0.6.1

[yoshi-automation]

The release build has started, the log can be viewed here. 🌻

[yoshi-automation]

🥚 You hatched a release! The release build finished successfully! 💜