Fix etcd startup

[Confushion]

After applying the fix for issue #1206, timing/race issues were still showing when creating etcd clusters with more than 1 instance.

This patch fixes the race condition by having etcdadm-reconfigure.service depend on service var-lib-etcd2.mount instead of format-etcd2-volume.service (var-lib-etcd2.mount already depends on that service).

Also a potential circulair dependency on cfn-etcd-environment.service has been eliminated.

[k8s-ci-robot]

Thanks for your pull request. Before we can look at your pull request, you'll need to sign a Contributor License Agreement (CLA).

📝 Please follow instructions at https://git.k8s.io/community/CLA.md#the-contributor-license-agreement to sign the CLA.

It may take a couple minutes for the CLA signature to be fully registered; after that, please reply here with a new comment and we'll verify. Thanks.

---

• If you've already signed a CLA, it's possible we don't have your GitHub username or you're using a different email address. Check your existing CLA data and verify that your email is set on your git commits.
• If you signed the CLA as a corporation, please sign in with your organization's credentials at https://identity.linuxfoundation.org/projects/cncf to be authorized.
• If you have done the above and are still having issues with the CLA being reported as unsigned, please email the CNCF helpdesk: helpdesk@rt.linuxfoundation.org

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes/test-infra repository. I understand the commands that are listed here.

[Confushion]

Closed PR, committed with wrong username. Use PR #1270 instead.

[codecov-io]

Codecov Report

Merging #1269 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master    #1269   +/-   ##
=======================================
  Coverage   36.63%   36.63%           
=======================================
  Files          63       63           
  Lines        3882     3882           
=======================================
  Hits         1422     1422           
  Misses       2242     2242           
  Partials      218      218

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 185ccc5...a4f1a9a. Read the comment docs.