move system related tests in a separate class
move system related tests in a separate class

Q-Leap-Networks/psutil,jamesblunt/psutil,cloudbase/psutil,landryb/psutil,msarahan/psutil,jorik041/psutil,tomprince/psutil,qbit/psutil,Q-Leap-Networks/psutil,giampaolo/psutil,msarahan/psutil,cloudbase/psutil,landryb/psutil,packages/psutil,mindw/psutil,mrjefftang/psutil,mindw/psutil,qbit/psutil,msarahan/psutil,jorik041/psutil,mindw/psutil,0-wiz-0/psutil,0-wiz-0/psutil,jamesblunt/psutil,mindw/psutil,jamesblunt/psutil,packages/psutil,packages/psutil,landryb/psutil,mindw/psutil,tomprince/psutil,mrjefftang/psutil,tomprince/psutil,mrjefftang/psutil,jorik041/psutil,tomprince/psutil,landryb/psutil,tomprince/psutil,cloudbase/psutil,giampaolo/psutil,landryb/psutil,qbit/psutil