Added memory leak tests for psutil module level functions.
Added memory leak tests for psutil module level functions.

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