Update etcd version referenced in docs, manifests

[caseydavenport]

Description

Update remaining references in docs, manifests to etcdv3 images.

Fixes #313

Todos

• Tests
• Documentation
• Release note

Release Note

The version of etcd included in the Calico kubeadm manifests has been revved to v3.1.10.

[caseydavenport]

@ozdanborne I revved for Mesos docs as well, I assume that should be fine...

[ozdanborne]

Interesting, advertise-client-urls isn't needed anymore?

[caseydavenport]

@ozdanborne I need to test, but I don't think it was ever needed...

[caseydavenport]

I was wrong, definitely needed :)

[ozdanborne]

Yep. For the record:

docker run quay.io/coreos/etcd:v3.1.10 etcd --listen-client-urls http://0.0.0.0:2379
2017-07-20 23:37:00.719729 E | etcdmain: error verifying flags, --advertise-client-urls is required when --listen-client-urls is set explicitly. See 'etcd --help'.
2017-07-20 23:37:00.719784 E | etcdmain: When listening on specific address(es), this etcd process must advertise accessible url(s) to each connected client.