Remove flag "--allow-privileged" form start-kubelet.ps1 in Kubernetes 1.15

[mrwonkerz]

The start-kubelet.ps1 runs in the an error when using with kubernetes version 1.15
In Kubernetes 1.15 the flag "--allow-privileged" for kubelet is obsolete.

.\start-kubelet.ps1 -NetworkMode Overlay -KubeDnsServiceIP 10.96.0.10 -LogDir C:\k\Logs
Flag --enable-debugging-handlers has been deprecated, This parameter should be set via the config file specified by the Kubelet's --config flag. See https://kubernetes.io/docs/tasks/administer-cluster/kubelet-config-file/ for more information.
Usage:
  kubelet [flags]
...
F0709 11:25:37.135712    3088 server.go:156] unknown flag: --allow-privileged

The kubelet-Service can not be started because of this.
Removing the flag "--allow-privileged" from the start-kubelet.ps1 script fixes the issue.

$kubeletArgs = @(
    "--hostname-override=$(hostname)"
    "--v=6"
    "--pod-infra-container-image=mcr.microsoft.com/k8s/core/pause:1.0.0"
    "--enable-debugging-handlers"
#   "--allow-privileged=true"
    "--cluster-dns=$KubeDnsServiceIp"
    "--cluster-domain=cluster.local"
    "--kubeconfig=c:\k\config"
    "--hairpin-mode=promiscuous-bridge"
    "--image-pull-progress-deadline=20m"
    "--cgroups-per-qos=false"
    "--log-dir=$LogDir"
    "--logtostderr=false"
    "--enforce-node-allocatable="""
    "--network-plugin=cni"
    "--cni-bin-dir="c:\k\cni""
    "--cni-conf-dir="c:\k\cni\config""
    "--node-ip=$(Get-MgmtIpAddress)"
)
if ($KubeletFeatureGates -ne "")
{
    $kubeletArgs += "--feature-gat

[wk8]

Fixed in #383

[mrwonkerz]

@wk8 I found out that the same problem exists int the register-svc.ps1 script.

Thanks for the fix

[wk8]

@mrwonkerz : thanks, good catch. Should be fixed by the new commit I've added to my PR (0965379).