Update nodeenv plugin and DS controller to not process openshift.io/node-selector if scheduler.alpha.kubernetes.io/node-selector is set on pods namespace

[aveshagarwal]

@sjenning @derekwaynecarr

manual pick of #21033

[derekwaynecarr]

/approve
/lgtm

[openshift-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: aveshagarwal, derekwaynecarr

The full list of commands accepted by this bot can be found here.

The pull request process is described here

Needs approval from an approver in each of these files:

• pkg/project/OWNERS [derekwaynecarr]
• vendor/k8s.io/kubernetes/pkg/controller/OWNERS [derekwaynecarr]

Approvers can indicate their approval by writing /approve in a comment
Approvers can cancel approval by writing /approve cancel in a comment

[aveshagarwal]

/test gcp

[aveshagarwal]

/test gcp

[sjenning]

/test gcp

[aveshagarwal]

/test gcp

[sjenning]

I'm seeing

2018/09/20 15:13:20 Build hyperkube failed, printing logs:

in the build-log.txt but there is nothing after that. There are not logs printed below that. I checked out the branch locally and hyperkube builds fine for me.

[sjenning]

Well we are past the hyperkube build step this time 👍

[aveshagarwal]

Well we are past the hyperkube build step this time +1

keeping fingers crossed.