Controller tests

[Segelzwerg]

Add test coverage for spring controller.

[codecov]

Codecov Report

Merging #62 into master will increase coverage by 15.73%.
The diff coverage is 80%.

@@              Coverage Diff              @@
##             master      #62       +/-   ##
=============================================
+ Coverage     67.85%   83.59%   +15.73%     
- Complexity      104      129       +25     
=============================================
  Files            22       23        +1     
  Lines           252      256        +4     
  Branches         11       12        +1     
=============================================
+ Hits            171      214       +43     
+ Misses           73       34       -39     
  Partials          8        8

Impacted Files	Coverage Δ	Complexity Δ
...g/sporttooolbox/web/heatmap/HeatMapController.java	100% <100%> (+100%)	8 <5> (+8)	⬆️
.../java/segelzwerg/sporttooolbox/web/Translator.java	100% <100%> (ø)	4 <1> (+1)	⬆️
...ava/segelzwerg/sporttooolbox/web/ImageService.java	25% <25%> (ø)	1 <1> (?)
...elzwerg/sporttooolbox/IUnits/KilometerPerHour.java	92.3% <0%> (+7.69%)	9% <0%> (+1%)	⬆️
...lzwerg/sporttooolbox/web/speed/SpeedPresenter.java	100% <0%> (+11.11%)	5% <0%> (+1%)	⬆️
.../sporttooolbox/IUnits/MinutesPerHundredMeters.java	75% <0%> (+12.5%)	4% <0%> (+1%)	⬆️
...werg/sporttooolbox/IUnits/MinutesPerKilometer.java	87.5% <0%> (+12.5%)	5% <0%> (+1%)	⬆️
...gelzwerg/sporttooolbox/web/pace/PacePresenter.java	100% <0%> (+14.28%)	4% <0%> (+1%)	⬆️
... and 3 more

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