Fix in-cluster heapster config

[floreks]

Fixes #2180

[codecov]

Codecov Report

Merging #2184 into master will decrease coverage by 0.02%.
The diff coverage is 12.5%.

@@            Coverage Diff             @@
##           master    #2184      +/-   ##
==========================================
- Coverage   58.89%   58.87%   -0.03%     
==========================================
  Files         559      559              
  Lines       11652    11659       +7     
==========================================
+ Hits         6863     6864       +1     
- Misses       4626     4632       +6     
  Partials      163      163

Impacted Files	Coverage Δ
.../backend/integration/metric/heapster/restclient.go	0% <0%> (ø)	⬆️
.../app/backend/integration/metric/heapster/client.go	73.82% <100%> (ø)	⬆️
...p/backend/integration/metric/common/aggregation.go	89.23% <0%> (+1.53%)	⬆️

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