adds test for cpu_times() which should fail on OSX
adds test for cpu_times() which should fail on OSX

stupidcache/psutil,jucapj/psutil,PFZheng/psutil,kiranvizru/psutil,skyshe/psutil,marmolu/psutil,google-code-export/psutil,peter-hst/psutil,vmolsa/psutil,huson2012/psutil,end18/psutil,PFZheng/psutil,kiranvizru/psutil,skyshe/psutil,end18/psutil,google-code-export/psutil,tigerneil/psutil,nmani1905/psutil,djhaskin987/psutil,end18/psutil,Alwnikrotikz/psutil,jucapj/psutil,vmolsa/psutil,creativewild/psutil,zhengzheng/psutil,chjwang/psutil,google-code-export/psutil,huson2012/psutil,anfedorov/psutil,creativewild/psutil,djhaskin987/psutil,skyshe/psutil,zhengzheng/psutil,tigerneil/psutil,djhaskin987/psutil,AlanZatarain/psutil,stupidcache/psutil,nmani1905/psutil,AlanZatarain/psutil,huson2012/psutil,tigerneil/psutil,Alwnikrotikz/psutil,anfedorov/psutil,google-code-export/psutil,shiva21/psutil,end18/psutil,kiranvizru/psutil,kiranvizru/psutil,marmolu/psutil,stupidcache/psutil,peter-hst/psutil,shiva21/psutil,skyshe/psutil,creativewild/psutil,chjwang/psutil,vmolsa/psutil,vmolsa/psutil,tigerneil/psutil,djhaskin987/psutil