Fix "install-kube-system" script when "clusterAutoscaler" is disabled.

[camilb]

Hi @mumoshu it looks that leaving the

  clusterAutoscaler:
    enabled: false

will break the "install-kube-system" script. This is the error in journald:

May 22 13:42:19 ip-10-0-1-49.ec2.internal install-kube-system[16493]: error: the path "/srv/kubernetes/manifests/cluster-autoscaler-de.yaml" does not exist

[codecov-io]

Codecov Report

Merging #671 into master will not change coverage.
The diff coverage is n/a.

@@          Coverage Diff           @@
##           master    #671   +/-   ##
======================================
  Coverage    37.1%   37.1%           
======================================
  Files          52      52           
  Lines        3210    3210           
======================================
  Hits         1191    1191           
  Misses       1842    1842           
  Partials      177     177

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[mumoshu]

@camilb Ah, my bad. Thanks a lot for the fix!
I will cut rc.2 with the fix asap.