Automatic merge from submit-queue
don't wait for first kubelet to be ready and drop dummy deploy
Per https://github.com/kubernetes/kubernetes/issues/43815#issuecomment-290270198, I suggest that we drop both the node ready and the dummy deployment check altogether for 1.6 and move them to a validation phase for 1.7.
I really think we should drop these checks altogether. CreateClientAndWaitForAPI should create a client and wait for the API, not create dummy deployments and wait for nodes to register and be healthy. These are end to end validations and this is the wrong place to do this stuff. We need an explicit final validation phase for this.
```release-note
Fix a deadlock in kubeadm master initialization.
```
Fixes#43815
57b7c75be9