Fix for timeout spawning sub process and needs vars exported

[jsturtevant]

Fixes timeout on control nodes introduced with #178

Timeout cmd spawns sub process and needs vars exported otherwise end up with error message during provisioning becuase KUBECTL varaible is missing

bash: line 1: get: command not found
bash: line 4: get: command not found
node/k8s-master-12396028-0 tainted
node/k8s-master-12396028-0 labeled
daemonset.apps/prepull created
daemonset.apps "prepull" deleted

which results in errors like:

 Jul  8 08:21:43.397: FAIL: Error waiting for all pods to be running and ready: 2 / 10 pods in namespace "kube-system" are NOT in RUNNING and READY state in 10m0s

Jul  8 00:34:49.082: INFO: >>> kubeConfig: /root/tmp013712723/kubeconfig/kubeconfig.eastus2.json
Jul  8 00:34:49.104: INFO: Waiting up to 30m0s for all (but 0) nodes to be schedulable
Jul  8 00:34:49.358: FAIL: Unexpected error:
    <*errors.errorString | 0xc002f2a7d0>: {
        s: "there are currently no ready, schedulable nodes in the cluster",
    }
    there are currently no ready, schedulable nodes in the cluster 

[jsturtevant]

/assign @chewong

[chewong]

/lgtm

[chewong]

/approve

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