added test for util/logfile.py with first test.
added test for util/logfile.py with first test.

gormanb/mtools,ces0712/mtools,devkev/mtools,gormanb/mtools,devkev/mtools,tomzhang/mtools,ces0712/mtools,rueckstiess/mtools,ces0712/mtools,tomzhang/mtools,yaowenqiang/mtools,aerrami/mtools,corymintz/mtools,tomzhang/mtools,corymintz/mtools,aerrami/mtools,yaowenqiang/mtools,aerrami/mtools,yaowenqiang/mtools,parkhyeonghwa/mtools,devkev/mtools,gormanb/mtools,parkhyeonghwa/mtools,rueckstiess/mtools,corymintz/mtools,parkhyeonghwa/mtools