Modified unit tests && operating system class. Reviewed by JN, thanks !!

Violette Roche-Montane

13.06.2014 2ed9940ca86ca86abf5fae8a5bdc461b32d1a13a

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user-friendly-plural-name=Programy Obs\u0142uguj\u0105ce Po\u0142\u0105czenia